Tweak issue page a bit 

Add project activity atom feed and show atom feed buttons everywhere where applicable.

See merge request !555

Change "Sam" to "Dmitriy" in feature steps

"Sam" was too short and generic and caused invalid test failures due to finding other people with names like "Sammie" or "Samuel" unexpectedly.

See https://ci.gitlab.com/projects/1/builds/35205 and https://ci.gitlab.com/projects/1/builds/35093 as two recent examples.

See merge request !571

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

This crappy test framework stuff fails randomly. So I can't reliably
run it on my local machine.

* Include creation time
* Include author without avatar
* Move assignee to the right
* Include comments counter by default, gray it out when there are 0
  comments.

* Include creation time
* Include author without avatar
* Move assignee to the right
* Remove action buttons. IMO they are useless and a bit annoying
* Include comments counter by default, gray it out when there are 0
  comments.

"Sam" was too short and generic and caused invalid test failures due to
finding other people with names like "Sammie" or "Samuel" unexpectedly.

Update d3_rails and jquery-atwho-rails

We were a bit behind on these JS libs, so this updates them.

AtWho made a few API changes for which I had to update our usage.

Should fix #1457 as well.

See merge request !542

Update mentionable shared examples to be (a bit) more understandable

These shared examples were super confusing, and honestly still kind of are, but they should be a bit better now.

I encountered a bunch of headaches in these examples while refactoring ReferenceExtractor, so that's how I ended up changing it.

See merge request !1780

Add default_url_options initializer

Fixes #2266

See merge request !1791

Use fixed width icons in all nav sidebars

| Before (watch the Network and Graphs icons as the sidebar collapses): | After: |
| :--------: | :------: |
|![Screen_Recording_2015-04-23_at_02.31_PM.mov](https://gitlab.com/gitlab-org/gitlab-ce/uploads/338aa382ff7609978cd900db29379f3f/Screen_Recording_2015-04-23_at_02.31_PM.mov.gif)|![Screen_Recording_2015-04-23_at_02.30_PM.mov](https://gitlab.com/gitlab-org/gitlab-ce/uploads/24af635f253688690b42da60271e7afb/Screen_Recording_2015-04-23_at_02.30_PM.mov.gif)|

Uses the `icon` helper, because I can't help myself!

See merge request !566

Fixes #2266

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>

Fix broken link in jira service

Disable turbolinks for omniauth link to avoid rendering problems

Redirect to sign in page after signing out.

Addresses internal issue https://dev.gitlab.org/gitlab/gitlabhq/issues/2125.

See merge request !541

Fix two places where we should be using `Rails.env.development?`

See merge request !550

Fix bug causing at-username inside code blocks to sometimes be picked up as a user mention.

Addresses private issue https://dev.gitlab.org/gitlab/gitlabhq/issues/2254.

See merge request !553

Use `search_text_nodes` helper in our custom filters

Closes #1477

See merge request !561

New sidebar design

I want to make separation between sidebar and content

- [x] change sidebar and header colors
- [x] change colors for old light theme so it matches dark style too
- [x] rename theme names to something more reasonable
- [x] fix header logo collapse with JS
- [x] fix navless layouts (explore page, login page, snippets, user page)
- [x] fix tests

See merge request !558