Always delete repositories from the filesystem when deleting a project.

Update the project API controller to use `Projects::DestroyService`
instead of calling `Project#destroy` directly.

Also add an optional parameter, `:keep_repo`, that allows a project to
be deleted without deleting the repository, wiki, and satellite from
disk.

Style merge request CI widget to match MR/Issue box

![Screenshot 2014-10-07 15.13.12](https://dev.gitlab.org/uploads/dzaporozhets/gitlabhq/7208a92094/Screenshot_2014-10-07_15.13.12.png)

![Screenshot 2014-10-07 15.13.25](https://dev.gitlab.org/uploads/dzaporozhets/gitlabhq/f04d8d3f7b/Screenshot_2014-10-07_15.13.25.png)

See merge request !1158

Gitlabflow references

See merge request !1160

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

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

Snippets refactoring: rename public to internal. STEP 1

See merge request !1157

Remove annoying i18n deprecation

Thanks to this guy http://stackoverflow.com/a/20381730

Fixes #527

See merge request !197

Factor markup? || gitlab_markdown? into new method

webbrowsers -> web browsers

number formatting fix

Slack integration

See merge request !1151

Add task lists to issues and merge requests

Raise on forgery

Fixes #1572

See merge request !1156

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

Improve autolink

Fixes #1649

See merge request !1155

Prevent PG::Error exception

Prevent PG::Error exception when check commit reference on commit

Fix #1646

See merge request !1154

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

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

Gitlab git bump

Fixes #1643

See merge request !1153

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

[minor-refactor] Remove unused title parameter on merge request creation helper.