Change issue board defaults

#### What does this MR do?
Changes the issue board default list from `Development`, `Testing`, `Production`, `Ready` to `To Do` and `Doing`

#### Screenshots (if relevant)
![Screen_Shot_2016-10-06_at_8.46.48_AM](/uploads/6e73e03f5749f18b95bd7e23c676603d/Screen_Shot_2016-10-06_at_8.46.48_AM.png)
![Screen_Shot_2016-10-06_at_9.07.06_AM](/uploads/cadd3af74e3adb73fe854478ce95120e/Screen_Shot_2016-10-06_at_9.07.06_AM.png)

#### What are the relevant issue numbers?
Closes #23025

See merge request !6716

Fix inconsistent highlighting of already selected activity nav-links

## What does this MR do?

*  Remove edge case where user could deselect an activity nav-link (which seems to be returning all the events)
*  Explicitly add an `All` tab to return all the events

## Are there points in the code the reviewer needs to double check?
Shouldn't be

## Why was this MR needed?
Resolves existing UI inconsistency

## Screenshots (if relevant)
Before:
![4OzkoQVJYc](/uploads/fd2a7fdbde2159e875482ec7b828fe60/4OzkoQVJYc.gif)

After:
![E0lj8UhEUU](/uploads/7eb5155861eb79d72957de04c9f172c9/E0lj8UhEUU.gif)

## Does this MR meet the acceptance criteria?

- [x] [CHANGELOG](https://gitlab.com/gitlab-org/gitlab-ce/blob/master/CHANGELOG) entry added
- Tests
  - [x] All builds are passing
- [x] Conform by the [style guides](https://gitlab.com/gitlab-org/gitlab-ce/blob/master/CONTRIBUTING.md#style-guides)
- [x] Branch has no merge conflicts with `master` (if you do - rebase it please)
- [x] [Squashed related commits together](https://git-scm.com/book/en/Git-Tools-Rewriting-History#Squashing-Commits)

## What are the relevant issue numbers?

*  Closes #21631
*  Closes #21452


See merge request !6091

Use gitlab-workhorse 0.8.4

Fixes Go 1.5 compatibility broken in 0.8.3.

See merge request !6712

Link to Registry docs from project settings

Add an icon with a link to the docs from the project settings.

See merge request !6726

Update profile view

## What does this MR do?
Centers entire profile information section

## Screenshots (if relevant)
Before:
![Screen_Shot_2016-10-03_at_4.23.03_PM](/uploads/bc2017e88cb52ec0e817c4c59e70a186/Screen_Shot_2016-10-03_at_4.23.03_PM.png)

After:
![Screen_Shot_2016-10-03_at_4.21.57_PM](/uploads/86ce1339d21cc39a64c22f27868a2986/Screen_Shot_2016-10-03_at_4.21.57_PM.png)

## Does this MR meet the acceptance criteria?

- [ ] [CHANGELOG](https://gitlab.com/gitlab-org/gitlab-ce/blob/master/CHANGELOG) entry added
- [ ] [Documentation created/updated](https://gitlab.com/gitlab-org/gitlab-ce/blob/master/doc/development/doc_styleguide.md)
- [ ] API support added
- Tests
  - [ ] Added for this feature/bug
  - [ ] All builds are passing
- [ ] Conform by the [merge request performance guides](http://docs.gitlab.com/ce/development/merge_request_performance_guidelines.html)
- [ ] Conform by the [style guides](https://gitlab.com/gitlab-org/gitlab-ce/blob/master/CONTRIBUTING.md#style-guides)
- [ ] Branch has no merge conflicts with `master` (if you do - rebase it please)
- [ ] [Squashed related commits together](https://git-scm.com/book/en/Git-Tools-Rewriting-History#Squashing-Commits)

## What are the relevant issue numbers?
Closes https://gitlab.com/gitlab-org/gitlab-ce/issues/22829

cc @dzaporozhets

See merge request !6662

Move user#show and group#show routing under root url

## What does this MR do?

Changes routing so user#show and group#show routing is under root url 

## Are there points in the code the reviewer needs to double check?

no

## Why was this MR needed?

For nice and consistent routing  for user/group show pages:

| before | after| 
|---|---|
| `/u/dzaporozhets` | `/dzaporozhets`| 
| `/dzaporozhets/gitlab-ce` |`/dzaporozhets/gitlab-ce`| 
| `/u/dzaporozhets/snippets` |`/u/dzaporozhets/snippets`| 
| `/groups/gitlab-org`|  `/gitlab-org`| 
| `/gitlab-org/gitlab-ce`|  `/gitlab-org/gitlab-ce`| 
| `/groups/gitlab-org/issues `|  `/groups/gitlab-org/issues `| 

So show page for user and group shown as `/:name` which is much nicer than before. At same time all nested pages like group issues stays under REST `/groups/:name/issues` so we don't need to introduce extra name restrictions ( ex. case when group has project with name "issues")

## Screenshots (if relevant)

## Does this MR meet the acceptance criteria?

- [x] [CHANGELOG](https://gitlab.com/gitlab-org/gitlab-ce/blob/master/CHANGELOG) entry added
- [ ] ~~[Documentation created/updated](https://gitlab.com/gitlab-org/gitlab-ce/blob/master/doc/development/doc_styleguide.md)~~
- [ ] ~~API support added~~
- Tests
  - [x] Added for this feature/bug
  - [x] All builds are passing
- [x] Conform by the [merge request performance guides](http://docs.gitlab.com/ce/development/merge_request_performance_guidelines.html)
- [x] Conform by the [style guides](https://gitlab.com/gitlab-org/gitlab-ce/blob/master/CONTRIBUTING.md#style-guides)
- [x] Branch has no merge conflicts with `master` (if you do - rebase it please)
- [x] [Squashed related commits together](https://git-scm.com/book/en/Git-Tools-Rewriting-History#Squashing-Commits)

## What are the relevant issue numbers?

Fixes https://gitlab.com/gitlab-org/gitlab-ce/issues/3620

See merge request !6686

Improve issue load time performance by avoiding ORDER BY in find_by call

See merge request !6724

Move container_registry user docs to new location

## What does this MR do?

Move container_registry user docs to new location and refactor them a bit.

Part of https://gitlab.com/gitlab-org/gitlab-ce/issues/3349

## Moving docs to a new location?

See the guidelines: http://docs.gitlab.com/ce/development/doc_styleguide.html#changing-document-location

- [ ] Make sure the old link is not removed and has its contents replaced with a link to the new location.
- [ ] Make sure internal links pointing to the document in question are not broken.
- [ ] Search and replace any links referring to old docs in GitLab Rails app, specifically under the `app/views/` directory.
- [ ] If working on CE, submit an MR to EE with the changes as well.

See merge request !6516

Replace bootstrap caret with fontawesome caret

## What does this MR do?

1. Replaces all occurrences of `.caret` with fontawesome's caret (`fa-caret-down` for most cases)
2. Remove `.caret` from CSS
3. Refactored pipeline graph toggle to display the correct fontawesome caret (Had to change some JavaScript for this)  

## Are there points in the code the reviewer needs to double check?

*  Need to check if I missed any pages 😥 or for any side effects

## Why was this MR needed?
Resolves UI inconsistency

## Screenshots (if relevant)
Before (1 example out of many):
![Screen_Shot_2016-09-12_at_3.49.58_PM](/uploads/5eb93bbcc00412a5875e39302f4d8ba0/Screen_Shot_2016-09-12_at_3.49.58_PM.png)

After:
![Screen_Shot_2016-09-12_at_3.49.48_PM](/uploads/9259a9ebfb0bd09b4cfd55674e9b8be4/Screen_Shot_2016-09-12_at_3.49.48_PM.png)

## Does this MR meet the acceptance criteria?

- [x] [CHANGELOG](https://gitlab.com/gitlab-org/gitlab-ce/blob/master/CHANGELOG) entry added
- Tests
  - [x] All builds are passing
- [x] Conform by the [merge request performance guides](http://docs.gitlab.com/ce/development/merge_request_performance_guidelines.html)
- [x] Conform by the [style guides](https://gitlab.com/gitlab-org/gitlab-ce/blob/master/CONTRIBUTING.md#style-guides)
- [x] Branch has no merge conflicts with `master` (if you do - rebase it please)
- [x] [Squashed related commits together](https://git-scm.com/book/en/Git-Tools-Rewriting-History#Squashing-Commits)

## What are the relevant issue numbers?
Closes #21169

See merge request !6314

The Sortable concern has a default scope that adds ORDER BY to all
queries. EXPLAIN ANALYZE shows that this additional ORDER BY statement
causes the SQL optimizer to use the wrong index, which leads to a load
time of 2.9 s vs 0.073 ms just for the SELECT call. The minimal
change here is to re-implement find_by using where and reorder to
remove the ORDER BY clause in IssuesController#index.

Closes #23075

Only hide deploy status external link on x-small screens.

## What does this MR do?

Fixes [a regression](https://gitlab.com/gitlab-org/gitlab-ce/commit/03ea01946524a74773b24430c81804c2724b84b6#68dead621eaa630b5150a4d71b59fa3cd19030fd_57_50) where the deploy status widget hides only the text within the widget, and only for screens within bootstrap's 'small' range (≥544px - <768px).
 
## Are there points in the code the reviewer needs to double check?

I changed the viewport width range to hide the widget from `sm` to `xs` because when the external link is removed, it seems to fit comfortably even on xs viewports. 

Given that we were already hiding the external link (along with all of the deploy text) on `sm` viewports, I assume it's okay to hide the external link still, instead of wrapping it to a new line. 

We could remove the conditional hiding altogether though, and allow the external link to wrap. Definitely doesn't look as nice, but if it's important to show the external link along with the deploy status, we could make it look better when it wraps.

## Why was this MR needed?

Looked buggy, and prevented context being given for build passed icon on smaller screens.

## Screenshots (if relevant)

Before: 

![57efae92cd57c192075546](/uploads/22b278756de4ca6ab3949a4a9692994e/57efae92cd57c192075546.gif)

After: 

![57efaeb41b211194979047](/uploads/b178ddfbbdcfe74d2ce9f52e989a6878/57efaeb41b211194979047.gif)

## Does this MR meet the acceptance criteria?

- [x] [CHANGELOG](https://gitlab.com/gitlab-org/gitlab-ce/blob/master/CHANGELOG) entry added
- [x] [Documentation created/updated](https://gitlab.com/gitlab-org/gitlab-ce/blob/master/doc/development/doc_styleguide.md)
- [x] API support added
- Tests
  - [ ] Added for this feature/bug
  - [x] All builds are passing
- [x] Conform by the [merge request performance guides](http://docs.gitlab.com/ce/development/merge_request_performance_guidelines.html)
- [x] Conform by the [style guides](https://gitlab.com/gitlab-org/gitlab-ce/blob/master/CONTRIBUTING.md#style-guides)
- [x] Branch has no merge conflicts with `master` (if you do - rebase it please)
- [x] [Squashed related commits together](https://git-scm.com/book/en/Git-Tools-Rewriting-History#Squashing-Commits)

## What are the relevant issue numbers?
https://gitlab.com/gitlab-org/gitlab-ce/issues/22778

cc: @jschatz1

See merge request !6633

Signed-off-by: Dmitriy Zaporozhets <dmitriy.zaporozhets@gmail.com>

Signed-off-by: Dmitriy Zaporozhets <dmitriy.zaporozhets@gmail.com>

Signed-off-by: Dmitriy Zaporozhets <dmitriy.zaporozhets@gmail.com>

Signed-off-by: Dmitriy Zaporozhets <dmitriy.zaporozhets@gmail.com>

[ci skip]

Closes https://gitlab.com/gitlab-org/omnibus-gitlab/issues/1433

See !6543.

Signed-off-by: Rémy Coutable <remy@rymai.me>

Added CC0 license to list of licenses

Adds a "license" (actually a deed, because its a dedication to the public domain) to the appropriate place in the documentation.

It adds another relevant license to our documentation.

See merge request !6622

Issue boards new issue form

## What does this MR do?

Adds a new issue form into the issue boards lists.

## Screenshots (if relevant)

![Screen_Shot_2016-10-03_at_14.57.30](/uploads/17fe6cd37bd020a2ee1688e0b496c18f/Screen_Shot_2016-10-03_at_14.57.30.png)

![Screen_Shot_2016-10-03_at_14.57.32](/uploads/c3f12bcb9ff9a0e7ce5b0bb06dfb0dd7/Screen_Shot_2016-10-03_at_14.57.32.png)

## What are the relevant issue numbers?

Part of #21219

See merge request !6653

Revert "Label list shows all issues (opened or closed) with that label"

## What does this MR do?

Revert changes made on https://gitlab.com/gitlab-org/gitlab-ce/merge_requests/5991. Reasoning here: https://gitlab.com/gitlab-org/gitlab-ce/issues/21691#note_16516861

## Does this MR meet the acceptance criteria?

- [X] [CHANGELOG](https://gitlab.com/gitlab-org/gitlab-ce/blob/master/CHANGELOG) entry added
- [X] [Documentation created/updated](https://gitlab.com/gitlab-org/gitlab-ce/blob/master/doc/development/doc_styleguide.md)
- Tests
  - [X] Added for this feature/bug
  - [ ] All builds are passing
- [X] Conform by the [merge request performance guides](http://docs.gitlab.com/ce/development/merge_request_performance_guidelines.html)
- [X] Conform by the [style guides](https://gitlab.com/gitlab-org/gitlab-ce/blob/master/CONTRIBUTING.md#style-guides)
- [ ] Branch has no merge conflicts with `master` (if you do - rebase it please)
- [X] [Squashed related commits together](https://git-scm.com/book/en/Git-Tools-Rewriting-History#Squashing-Commits)

## What are the relevant issue numbers?

Closes #21691

See merge request !6695

Signed-off-by: Rémy Coutable <remy@rymai.me>

MergeRequest new form load diff asynchronously

## What does this MR do?

Don't return diff tab content from the server when request for a new merge request

## Are there points in the code the reviewer needs to double check?

## Why was this MR needed?

To avoid 502 errors due to this controller action takes to much time

## What are the relevant issue numbers?

Relates #13912

## Screenshots (if relevant)

## Does this MR meet the acceptance criteria?

- [x] [CHANGELOG](https://gitlab.com/gitlab-org/gitlab-ce/blob/master/CHANGELOG) entry added
- ~~[ ] [Documentation created/updated](https://gitlab.com/gitlab-org/gitlab-ce/blob/master/doc/development/doc_styleguide.md)~~
- ~~[ ] API support added~~
- Tests
  - [x] Added for this feature/bug
  - [x] All builds are passing
- [x] Conform by the [style guides](https://gitlab.com/gitlab-org/gitlab-ce/blob/master/CONTRIBUTING.md#style-guides)
- [x] Branch has no merge conflicts with `master` (if you do - rebase it please)
- [x] [Squashed related commits together](https://git-scm.com/book/en/Git-Tools-Rewriting-History#Squashing-Commits)

See merge request !5844

Fix broken handling of certain calls in GitHub importer client

## What does this MR do?
It changes/fixes the behavior of request handling in GH client. Now it returns the response directly if it's not a collection of resources. Otherwise, it checks for a passed block, if true, then it yield each page to said block, if not, it collects all response in a single array then returns it.

Closes #22998

See merge request !6703

API: Use Grape DSL to document access requests and members endpoints

Part of #21979, depends on gitlab-org/gitlab-ce!6267 and gitlab-org/gitlab-ce!6266.

See merge request !6269

Fixes Go 1.5 compatibility.

See !6096.

Issue Board API support

## What does this MR do?

Adds support for Issue Board in the API.

## Are there points in the code the reviewer needs to double check?

~~Double check whether the Issue Board list movement fix is needed.~~ 

*Moved to a separate issue.* [#22890](https://gitlab.com/gitlab-org/gitlab-ce/issues/22890)

## Why was this MR needed?

Currently the API offers partial support to a project's Issue Board indirectly through Labels.
This MR adds support for listing, creating, moving and removing board lists.

## Does this MR meet the acceptance criteria?

- [X] [CHANGELOG](https://gitlab.com/gitlab-org/gitlab-ce/blob/master/CHANGELOG) entry added
- [X] [Documentation created/updated](https://gitlab.com/gitlab-org/gitlab-ce/blob/master/doc/development/doc_styleguide.md)
- [X] API support added
- Tests
  - [X] Added for this feature/bug
  - [X] All builds are passing
- [X] Conform by the [merge request performance guides](http://docs.gitlab.com/ce/development/merge_request_performance_guidelines.html)
- [X] Conform by the [style guides](https://gitlab.com/gitlab-org/gitlab-ce/blob/master/CONTRIBUTING.md#style-guides)
- [X] Branch has no merge conflicts with `master` (if you do - rebase it please)
- [X] [Squashed related commits together](https://git-scm.com/book/en/Git-Tools-Rewriting-History#Squashing-Commits)

## What are the relevant issue numbers?
[#22195](https://gitlab.com/gitlab-org/gitlab-ce/issues/22195)

See merge request !6646

Signed-off-by: Rémy Coutable <remy@rymai.me>