Dedicated method for counting commits between refs

Corresponding gitlab_git merge request: https://gitlab.com/gitlab-org/gitlab_git/merge_requests/66
Issue that lead to these changes: https://gitlab.com/gitlab-org/gitlab-ce/issues/12619

See merge request !2707

Feature/jschatz1/sidebar features

* Changes sidebar width (290px).
* Makes shortcuts for <kbd>j</kbd> and <kbd>k</kbd> keys for next and previous issues.

![Screen_Shot_2016-02-05_at_3.06.22_PM](/uploads/8590be43dc1b9feffd4f32b4e8cb7790/Screen_Shot_2016-02-05_at_3.06.22_PM.png)

cc/ @dzaporozhets 

See merge request !2734

Fix diff and commit view on merge requests

with new sidebar
Fixes #3981

See merge request !2718

Fixes for issue with poor logo transition animation on Safari

See merge request !2690

updates after code review: moved coffee code to appropriate file, updated css to not use js-prefixed selectors

Updated comments and Changelog

Removed duplicate line in changelog

Improve placeholder: search -> Search
Signed-off-by: Dmitriy Zaporozhets <dmitriy.zaporozhets@gmail.com>

See merge request !2732

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

Thanks @rspeicher

Change edited icon to word.
Change edited text color to gray
cc/ @creamzy

Make sure the public/uploads/ directory is created



See merge request !2730

Fix double paging

![Screen_Shot_2016-02-05_at_10.27.34_AM](/uploads/a21ad6c47ddecad29d377497ee2a167d/Screen_Shot_2016-02-05_at_10.27.34_AM.png)

![Screen_Shot_2016-02-05_at_10.27.44_AM](/uploads/3badb423df25f009886138c65cfe8347/Screen_Shot_2016-02-05_at_10.27.44_AM.png)


See merge request !2727

[ci skip]

Improve admin broadcast messages page

* Show latest broadcast messages first on admin page
* Use nice looking pagination
Signed-off-by: Dmitriy Zaporozhets <dmitriy.zaporozhets@gmail.com>

Fixes #13211 

cc @rspeicher @DouweM 

See merge request !2725

Fix Ruby SHA in installation guide

The Ruby SHA that we were checking against in the
installation guide was wrong. I replaced it with
sha256sum which is also present in the Ruby downloads
page. Also added it as a note in the doc styleguide. 

See merge request !2726

[ci skip]

Page project list on dashboard



See merge request !2689

* Show latest broadcast messages first on admin page
* Use nice looking pagination
Signed-off-by: Dmitriy Zaporozhets <dmitriy.zaporozhets@gmail.com>

[ci skip]

Improve reuse of existing UI components

* Re-use top-are css component for issues/mr pages
* Add support for inline form in nav-controls component

cc @jschatz1 

See merge request !2722

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>

Refactor session API documentation



See merge request !2473

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

Refactor deploy_key_multiple_projects API documentation



See merge request !2468

New padding for lists

* improve consistency for list padding
* reduce padding for project/group/events lists
Signed-off-by: Dmitriy Zaporozhets <dmitriy.zaporozhets@gmail.com>

Fixes #12511 

cc @jschatz1 @skyruler @creamzy 

See merge request !2715

Fix label links for a merge request pointing to issues list

_Originally opened at !2150._

---

I have added a type parameter to the `link_to_label` helper method that is set to `'merge_request'` when in the context of a merge request.

I have also improved the specs to actually test the output of the method instead of its implementation.

Fixes #3007.

See merge request !2700

Change placeholder text to just 'search'

Fixes #13168 

![Screen_Shot_2016-02-04_at_12.30.16_PM](/uploads/ca3c5549abeedce99d693606135d7428/Screen_Shot_2016-02-04_at_12.30.16_PM.png)


See merge request !2711

with new sidebar
Fixes #3981

* improve consistency for list padding
* reduce padding for project/group/events lists
Signed-off-by: Dmitriy Zaporozhets <dmitriy.zaporozhets@gmail.com>

gitlab_git 8.1 adds the ability to count the amount of commits between
two references without having to allocate anything but regular
Rugged::Commit objects. This in turn speeds up the process of counting
the number of commits a branch is ahead/behind by about 3.5x.

You can set type: :merge_request to create a link to merge request
lists instead of issues list. Accept both Symbol & String as type
argument for the link_to_label helper

Puts shortcut key in the right place.

Fixes #13192

![Screen_Shot_2016-02-04_at_11.51.15_AM](/uploads/a10dc24b4a836199351ba98fca266695/Screen_Shot_2016-02-04_at_11.51.15_AM.png)


See merge request !2710