Fix deleted file representation with new gitlab_git gem

Added this MR as per request from https://github.com/gitlabhq/gitlabhq/pull/7980

* Add new gitlab_gem as per gitlab-org/gitlab_git!6
* Fix the showing of deleted file, as it only displays the named of the file, rather than specifying what had happened

**Before**

![Screen Shot 2014-12-30 at 21.02.55](https://gitlab.com/uploads/arif-ali/gitlab-ce/67ec88b06d/Screen_Shot_2014-12-30_at_21.02.55.png)

**After**

![Screen Shot 2014-12-30 at 21.05.18](https://gitlab.com/uploads/arif-ali/gitlab-ce/050b689c82/Screen_Shot_2014-12-30_at_21.05.18.png)

See merge request !273

Fix xmlns:media namespacing for atom feeds

A recent commit gitlab-org/gitlab-ce@d31d711a70779132ea43387f93eb4ccc1e472761 introduced a bug that broke four of the atom feeds. The namespace for xmlns:media was not defined properly. This patch fixes the issues for all four feeds.

See merge request !274

Use plural on permissions doc

See merge request !276

Add tests for disabled blob edit button cases v2

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

Markdown preview in wiki

Raise group avatar filesize limit to 200kb, fixes #8527

Improve merge widget

* remove title `You can merge it` since button below says same
* fixed layout for custom commit message
* make button a bit bigger

See merge request !1365

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 HipChat Server

Merge request commits view

Changes the commits view of a merge request to use the same layout as used in the project commits view.

As noticed from #923.

This also changes the commits icon on the tab to be fa-history, the same as used in the sidebar

Screenshots [Before](https://gitlab.com/uploads/stephanvl/gitlab-ce/8785737424/Screenshot_from_2014-12-29_20_39_25.png) - [After](https://gitlab.com/uploads/stephanvl/gitlab-ce/a3bf2a790f/Screenshot_from_2014-12-29_20_40_23.png)

See merge request !271

User ssh keys on admin

Show user ssh keys on admin user page.

See merge request !1362

Ajax group select

Helper method for creatins select2 selectbox with ajax query to groups via API

See merge request !1363

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 UI for protected branches

See merge request !1361

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

Implemented notes (body) patching in API.

chmod -x

The merge request commits tab now uses the same layout as used in the project commits view

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

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

Fix async services execution broken in 7.6

Fixes https://gitlab.com/gitlab-org/gitlab-ce/issues/920

See merge request !1360

API: Project ordering

Added support for ordering and sorting projects by id, name, created_at or last_activity_at fields.

When the order_by parameter is passed the projects will be ordered by the appropriate field, when the parameter is not passed the original ordering will apply.

the sort parameter will default to ASC, and will only be DESC if the sort parameter is desc

See merge request !266