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

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

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

Remove newrelic gem. Closes #12860



See merge request !2682

Hide remove source branch button when new commit is added to branch

Fixes #3339

This MR hides the 'Remove source branch' button when a new commit is added to the source branch

/cc @DouweM

See merge request !2701

Sort projects by last activity for new issue dropdown

When creating new issue from dashboard page I want to see projects
sorted by last activity instead of ID
Signed-off-by: Dmitriy Zaporozhets <dmitriy.zaporozhets@gmail.com>

See merge request !2702

For big instances search autocomplet is flooded with groups you have no
access to and insternal/public projects you don't care. It affects way
how easily you can go to group/project you are actually member of
Signed-off-by: Dmitriy Zaporozhets <dmitriy.zaporozhets@gmail.com>

When creating new issue from dashboard page I want to see projects
sorted by last activity instead of ID
Signed-off-by: Dmitriy Zaporozhets <dmitriy.zaporozhets@gmail.com>

Fixes #3339

This MR hides the 'Remove source branch' button when a new commit is added to the source branch

Make Pipelines responsible for defining their custom whitelist

This allows for future pipelines to more easily define a custom
whitelist.

See merge request !2693

No space required after WIP identifier

Fixes #2426 

Currently, the WIP: (or any other variation) prefix of a merge request title must include a trailing space for it to be recognized as a work in progress and prevent merging. 
To resolve this, I added an or pattern to the regexp to look for any one of the three possible delimiters ':', ']', or ' '. This way the trailing space isn't required but it still won't mark any titles beginning with wip as work in progress (e.g. "Wipwap").

See merge request !1876

Sort projects by last activity for project switcher in header
Signed-off-by: Dmitriy Zaporozhets <dmitriy.zaporozhets@gmail.com>

Fixes #13172 

See merge request !2692

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

Use top-area component for top page navigation for pages that contains list of items
Signed-off-by: Dmitriy Zaporozhets <dmitriy.zaporozhets@gmail.com>

See merge request !2686

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

This allows for future pipelines to more easily define a custom
whitelist.

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

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

Add sort dropdown to dashboard projects page
Signed-off-by: Dmitriy Zaporozhets <dmitriy.zaporozhets@gmail.com>

First step to improve projects page. Related to !2568 and #3968 

See merge request !2691

Thanks @rspeicher.

Adds the markdown link at the cursor poisition

When writing a comment and then dropping an image it will correctly add the image markdown link at the cursor position

![drop-image-markdown](/uploads/52f41e38faca48c9ee01a02a75ec71be/drop-image-markdown.gif)

Tested in Chrome & Firefox and both working fine 👍 

Fixes #12822 

cc. @jschatz1 

See merge request !2648

Remove useless text tips on commonly used pages
Signed-off-by: Dmitriy Zaporozhets <dmitriy.zaporozhets@gmail.com>

See merge request !2687