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

[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

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

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

Implement new design for issue and merge request right sidebar

Fixes #3981 



See merge request !2645

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

cc @DouweM 

See merge request !2708

fix documentation bug / typo

Hey, noticed this a little bit ago.  Need to get the example matching up with the following explanation.

See merge request !2709

Fix atom url issue on projects

This MR adds prevents a project to have a path ending in .atom that conflicts with the feed

and 

Adds a migration to migrate old .atom projects to a different path

Fixes https://gitlab.com/gitlab-org/gitlab-ce/issues/3699

See merge request !2651

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

Support Two-factor Authentication for LDAP users

Closes #12653

See merge request !2688