Cleanup stuck CI builds

Fixes #3143

/cc @dzaporozhets @jacobvosmaer 

See merge request !1655

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

Extend yml syntax for only and except to support specifying repository path

This allows to limit execution of jobs to specific repository.

For example:
```yaml
job:
  only:
    - branches@gitlab-org/gitlab-ce
  except:
    - master@gitlab-org/gitlab-ce
```

The above will run `job` for all branches on `gitlab-org/gitlab-ce`, except master.

@dzaporozhets @JobV @vsizov Please review.


See merge request !1720

Remove inflector rule that makes commits uncountable
Signed-off-by: Dmitriy Zaporozhets <dmitriy.zaporozhets@gmail.com>

Before: 

```
>> "commits".singularize
=> "commits"
>> "commit".pluralize
=> “commits”
```

After: 

```
>> "commits".singularize
=> "commit"
>> "commit".pluralize
=> “commits”
```

cc @rspeicher 

See merge request !1726

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

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

Add 'New file' link to dropdown on project page
Signed-off-by: Dmitriy Zaporozhets <dmitriy.zaporozhets@gmail.com>

Screenshot: 

![Screenshot_2015-11-02_15.33.41](/uploads/ecc87c6bda9e3f0680e5422d5cdc08f9/Screenshot_2015-11-02_15.33.41.png)


Fixes internal issue https://dev.gitlab.org/gitlab/gitlabhq/issues/2562

See merge request !1719

Update links in CI docs after GitLab 8.1

Fix that some links to CI status in docs were broken even after following redirects.

As CI build overview is now missing (cf. #3008), this MR uses `?scope=all` parameter.

See merge request !1733

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

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

Explicitly require backup/files

Fixes a test failure we were seeing on CI after merging !1520

See merge request !1731

Fix deprecated `prepend_before_filter` -> `prepend_before_action`

Add ability to fetch the commit ID of the last commit that actually touched a file

https://dev.gitlab.org/gitlab/gitlabhq/issues/2564

See merge request !1718

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

Reduce disk IO and space usage during backups

This is based on improvements made to the GitLab CI 8.0 backup script.

- Avoid creating many small intermediate files while backing up builds and uploads by using tar and light gzip compression
- Use same backup/restore code for uploads and builds
- Only store a compressed intermediate DB dump

See merge request !1520

Add custom protocol whitelisting to SanitizationFilter

Addresses internal https://dev.gitlab.org/gitlab/gitlabhq/issues/2613

We allow any protocol for autolinks: irc://irc.freenode.net/git

But manual Markdown links with the same protocol get sanitized: `[This will not be clickable](irc://irc.freenode.net/git)`: [This will not be clickable](irc://irc.freenode.net/git)

To get around this we have to first allow *all* protocols, and then manually clean dangerous (i.e., `javascript:`) protocols.

See merge request !1496

Persist blob editor's value on submit, not on click

Prior, the value of the Ace editor was only being persisted if the user
physically clicked the submit button, which the "quick submit" behavior
doesn't do.

Now the value will be properly transferred before any form is submitted.

See merge request !1712

Go to gitlab installation folder before initialize database

Gilab -> GitLab

Replace `Gitlab` with `GitLab`

See merge request !1715

Fix typo in rake task doc



See merge request !1713

Fix deadlink in docs for ci/examples

Just fix a deadlink in docs for ci/examples.

See merge request !1710

Prior, the value of the Ace editor was only being persisted if the user
physically clicked the submit button, which the "quick submit" behavior
doesn't do.

Now the value will be properly transferred before any form is submitted.

Switch to gitlab-workhorse

This is a little annoying but it is better to change this name then
to be stuck with a bad name for a long time. Reasons for the name
change: https://gitlab.com/gitlab-org/gitlab-git-http-server/issues/13

See merge request !1707

Improve performance of User.find_by_any_email



See merge request !1698