Close issues mentioned in MR description when MR is merged using
fast-forward merge or when merge commit message is edited.

Fixes gitlab-org/gitlab-ee#48.

See merge request !1639

Allow users to select the Files view as default project view


![Screen_Shot_2015-10-17_at_19.24.01](/uploads/c3194db856f5e5e1b3493302c0a479a5/Screen_Shot_2015-10-17_at_19.24.01.png)

Also shows the readme at the very bottom, like on the regular Files page.


Replaces !1489.

Closes #2655.

See merge request !1632

Fix bug where a push would only create cross references from the first commit.

Apparently we can't `return` from a `Hash.new` block. Who knew.

See merge request !1638

Fix spelling of Description

Show merge requests which close current issue

Closes #2903

### What does this MR do
If an issue is to be closed by a merge request the current user has access to, this will be displayed when the user looks at the issue.

![Screenshot_from_2015-10-12_12-10-37](https://gitlab.com/zj/gitlab-ce/uploads/52e429704e73067b24b69801f13ad7bc/Screenshot_from_2015-10-12_12-10-37.png)

/cc @DouweM

See merge request !1569

Fix padding of outdated discussion item.

Old:

![Screen_Shot_2015-10-16_at_09.29.17](https://gitlab.com/gitlab-org/gitlab-ce/uploads/d715debebe54d27c2eed7c22843e886c/Screen_Shot_2015-10-16_at_09.29.17.png)

New:

![Screen_Shot_2015-10-16_at_09.29.23](https://gitlab.com/gitlab-org/gitlab-ce/uploads/7c0c033adade92cb16406c027cb4c010/Screen_Shot_2015-10-16_at_09.29.23.png)

It still looks the same when the discussion is expanded.

See merge request !1614

Fix nonatomic database update potentially causing project star counts to go negative

The `counter_cache` decrement function is called when a project star is deleted,
but there was no guarantee multiple workers would not attempt to delete the
same item simultaneously. Use an atomic update to prevent the count from going negative.

Note: I was only able to duplicate the issue on GitLab.com, but I haven't been able to replicate it anywhere else. Presumably this bug happens when the `WHERE` clause takes some time to search for the right entry and multiple requests get sent simultaneously. Need to verify whether this fix truly solves the issue.

Closes #3067

See merge request !1628

Separate rendering of Markdown reference links from redacting those the user doesn't have access to and extracting referenced objects

Related: !1014

See merge request !1090

Temporary bring /ci page page with help information
Signed-off-by: Dmitriy Zaporozhets <dmitriy.zaporozhets@gmail.com>

See merge request !1630

Redirect old CI project route to GitLab project
Signed-off-by: Dmitriy Zaporozhets <dmitriy.zaporozhets@gmail.com>

See merge request !1629

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

Hide Builds tab is GitLab CI is not enabled
Signed-off-by: Dmitriy Zaporozhets <dmitriy.zaporozhets@gmail.com>

See merge request !1627

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

The counter_cache decrement function is called when a project star is deleted,
but there was no guarantee multiple workers would not attempt to delete the
same item simultaneously. Use an atomic update to prevent the count from going negative.

Closes #3067

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

Allow dashboard and group issues/MRs to be filtered by label

See merge request !1591

Fix import from SVN link

See merge request !1617

See merge request !1623

Use gitlab-git-http-server 0.3.0 for GitLab 8.1

See merge request !1605

This adds indexes for the following columns:

* notes.line_code
* ci_projects.gitlab_id
* ci_projects.shared_runners_enabled
* ci_builds.type
* ci_builds.status

Track compatible gitlab-git-http-server version

The 'git archive' changes in GitLab 8.1 require a version of
gitlab-git-http-server that is incompatible with GitLab 8.0, so we
need to keep track of this now.

See merge request !1603

Improve typography



See merge request !1622

Dont put padding on typography but on holder elements instead
Signed-off-by: Dmitriy Zaporozhets <dmitriy.zaporozhets@gmail.com>

Fixes wrong padding of wiki content. 


cc @JobV @skyruler 

See merge request !1620

Make selectbox options more compact
Signed-off-by: Dmitriy Zaporozhets <dmitriy.zaporozhets@gmail.com>

See merge request !1619