This also required some changes to the specs (as they weren't entirely
working correctly) and the ProjectsFinder itself to make it possible to
UNION more than 2 queries together.

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

Lfs batch download to stable

!1842 for stable

See merge request !1853

Lfs on by default and backup



See merge request !1852

Fix for Emoji (to stable)



See merge request !1850

See merge request !1851

Merge 8-2-stable into 8-2-stable-ee



See merge request !59

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>

Improve performance of user profiles, finding groups, and finding projects

This MR improves the following:

* Rendering of profile pages and Atom feeds
* Finding groups (using GroupsFinder & friends)
* Finding projects (using ProjectsFinder & friends)

Initially this MR was intended to only improve rendering of Atom feeds, but over time other fixes were introduced as well as the same code was the cause of all these problems.

See merge request !1790

Add clipboard button to merge request cross-project reference

See merge request !1847

Award Emoji

This it first iteration of award emoji feature.
We have plan to extend emoji picker by the next release.

For now, you can add award by clicking to the emoji picker or posting a regular comment with emoji like "👍" and any other. You can post not only emoji that listed in the emoji picker.

See merge request !1825

Commits without .gitlab-ci.yml are marked as skipped

- Commits without .gitlab-ci.yml are marked as skipped
- Save detailed error when YAML syntax

This also fixes: #3521 #3546 

/cc @jacobvosmaer 


See merge request !1827

Add a fallback for Safari copy-to-clipboard

Also, hide the tooltip in a less stupid way.

Closes #3547

See merge request !1844

Improve personal snippet access workflow.

Replaces !1709

Fixes #3258

See merge request !1817

Add option to create merge request when editing/creating a file

Replaces !1611 

Fixes #3059

See merge request !1820

Fix 'Attach a file' link in new tag form

Also removed a little bit of code repetition :)

See merge request !1834

Conflicts remaining:

- app/controllers/groups/group_members_controller.rb
- app/controllers/projects/project_members_controller.rb
- app/models/ability.rb
- app/models/member.rb
- app/models/project.rb

Update gitlab-shell documentation to 2.6.7



See merge request !1836

Add link to git-lfs client  [ci skip]



See merge request !1832

Check which folders and archives should be packed before passing to tar command.

If user uses backup task with SKIP and skips one of the archives listed(uploads, builds, artifacts) backup create will give an error: `Cannot stat: No such file or directory`.

This MR fixes that by checking for skipped items.
Additionally, compact everything to avoid `TypeError: no implicit conversion of nil into String` errors.

See merge request !1824

Documentation for Git LFS

Doc explaining how to use Git LFS, how to use Git LFS with GitLab, known issues and troubleshooting tips.

See merge request !1813

Deploy page should be shown for all pages not just root

Related to change already merged to Omnibus - gitlab-org/omnibus-gitlab!540

This change makes it so the deploy page is shown on all GitLab pages if the page exists. Users will no longer receive the 502 when deploys are happening.

See merge request !1828

Do not limit workhorse POST/PUT size in NGINX

Limiting, if any, should happen in gitlab-workhorse.

See merge request !1831

Add option to mirror an upstream repository.

Closes internal https://dev.gitlab.org/gitlab/gitlab-ee/issues/279

Depends on gitlab-org/gitlab-shell!29

To do:

- [x] Decide on what user should be the author of the activity feed events. The initial project creator perhaps? That makes sense for personal projects, but less so for group projects, where it's even possible that the creator has since left the team.
- [x] Write specs!
- [x] Write documentation
- [x] Port back relevant commits to CE: gitlab-org/gitlab-ce!1822

----

## Mirror status on project homepage

![Screen_Shot_2015-11-12_at_12.48.15](/uploads/39666b0e4a14723407b0f66e2aaddb46/Screen_Shot_2015-11-12_at_12.48.15.png)


## Settings navigation item

![Screen_Shot_2015-11-10_at_17.32.27](/uploads/116ece85f65681bbd3c7c5e282ab3b3c/Screen_Shot_2015-11-10_at_17.32.27.png)

## Mirroring settings

![Screen_Shot_2015-11-17_at_11.17.17](/uploads/ff57c89831524435ec6a063c3c470203/Screen_Shot_2015-11-17_at_11.17.17.png)


## Activity feed with new "pushes" (mirror updates)
![activity_feed](/uploads/04754251f2142fd06b1fddc2aae45232/activity_feed.png)

I have yet to decide on what user should be the author of these events. The initial project creator perhaps? That makes sense for personal projects, but less so for group projects, where it's even possible that the creator has since left the team.

## Warning that branch has diverged from upstream
![diverged](/uploads/ecf7ae6c5709f626c750695f45ca521a/diverged.png)

## Commits heading after failed update
![commits_failure](/uploads/d1b3e1f6796431c839ee9e2f67499283/commits_failure.png)

Link send user to the mirroring settings if they are a project admin.

## Mirroring settings after failed update

![Screen_Shot_2015-11-12_at_12.43.09](/uploads/ece68d5021c9a4c374bf6d973cf9fafa/Screen_Shot_2015-11-12_at_12.43.09.png)

## New project page
![new_project](/uploads/296beb6c7faf390a9b7e1facc9c1d4d6/new_project.png)

## Import form after failed import
(Screenshot outdated)

![new_import_failure](/uploads/ac0ebfc8ec23232603126fe0a6e10171/new_import_failure.png)

Shown when the initial import of a project fails, not when an update of an existing project fails.

cc @dzaporozhets @sytses @JobV

See merge request !51

Backport relevant changes from gitlab-org/gitlab-ee!51

To do:

- [x] Update gitlab-shell

See merge request !1822

[ci skip]