Ths commit does next:

* When we remove project we move repository to path+deleted.git
* Then we schedule removal of path+deleted with sidekiq
* If repository move failed we abort project removal

This should help us with NFS issue when project get removed but
repository stayed. The full explanation of problem is below:

* rm -rf project.git
* rm -rf removes project.git/objects/foo
* NFS server renames foo to foo.nfsXXXX because some NFS client (think
* Unicorn) still has the file open
* rm -rf exits, but project.git/objects/foo.nfsXXX still exists
* Unicorn closes the file, the NFS client closes the file (foo), and the
* NFS server removes foo.nfsXXX
* the directory project.git/objects/ still exists => problem

So now we move repository and even if repository removal failed

Repository directory is moved so no bugs with project removed but
repository directory taken. User still able to create new project with
same name. From administrator perspective you can easily find stalled
repositories by searching `*+deleted.git`
Signed-off-by: NDmitriy Zaporozhets <dmitriy.zaporozhets@gmail.com>

GitLab CI service sends gitlab-ci.yml file

See merge request !689

Specify shell while run me as git user

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

Create and edit files in web editor via rugged

- [x] create file via rugged
- [x] update file via rugged
- [x] remove file via rugged
- [ ] fix tests
- [x] remove satellites code
- [x] create activity event for new/edit file via rugged
- [x] base64 support

Part of https://dev.gitlab.org/gitlab/gitlabhq/issues/2300

See merge request !751

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

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

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

Fix link_to_gfm with only a reference having the incorrect link

Before:

```ruby
link_to_gfm("#4", "/foo")     # => "<a href="/namespace/project/issues/4" class="gfm gfm-issue">#4</a>"
link_to_gfm("See #4", "/foo") # => "<a href="/foo">See </a><a href="/namespace/project/issues/4" class="gfm gfm-issue">#4</a>"
```

After:

```ruby
link_to_gfm("#4", "/foo")     # => "<a href="/foo">#4</a>"
link_to_gfm("See #4", "/foo") # => "<a href="/foo">See </a><a href="/namespace/project/issues/4" class="gfm gfm-issue">#4</a>"
```

Closes #192
Closes #1721
Closes [GitHub #7115](https://github.com/gitlabhq/gitlabhq/issues/7115)

See merge request !739

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

Add an option to automatically sign-in with an Omniauth provider

Split of !669 as requested

This is useful when integrating with existing SSO environments and we want to use a single Omniauth provider for all user authentication.

See merge request !723

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

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

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

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

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

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

Refactor header css/html

* Fixes UI issue with header on zoom
* Replace duplicate numbers with variable
* Better names for css classes
* refactor header views

Fixes #1640

See merge request !750

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

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

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

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

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

Explain gitlab forks in Gemfile
Signed-off-by: NDmitriy Zaporozhets <dmitriy.zaporozhets@gmail.com>

Fixes https://dev.gitlab.org/gitlab/gitlabhq/issues/2358

See merge request !749

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

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

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

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

Disable changing of the source branch in merge request update API

As noted in: https://gitlab.com/gitlab-org/gitlab-ce/merge_requests/738#note_1307284

See merge request !745

Allow to configure a URL to show after sign out

Split of !669 as requested

This is especially useful with SAML ( !722 ) since the omniauth-saml gem does not support single log-out. This provides a way to log out the user from the SAML IdP after signing out from GitLab.

See merge request !725

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

small typo

See merge request !747

Fix misplaced changelog entry for SAML support

See merge request !746

Add an option to automatically sign-in with an Omniauth provider without showing the GitLab sign-in page

This is useful when integrating with existing SSO environments and we want to use a single Omniauth provider for
all user authentication.