Add X-GitLab-Event header for web hooks

Fix contributions calendar empty problem under mysql

Add new admin settings

Add new settings to the admin web UI for default project and snippet visibility levels.  See #2027.

### New settings:

![default_visibility_settings](https://dev.gitlab.org/gitlab/gitlabhq/uploads/bd6d296e39ea3c90ca6a5254b8eb1fef/default_visibility_settings.png)

See merge request !1795

google -> Google

Add notify and color options to HipchatService

When notify is set to true send messages will trigger a notification for
all room members.
Color changes the background color of the message.

Version 7.10.0 has been released so its 7.11.0-pre time

Add new global application settings for default project and snippet
visibility levels.

Signed-off-by: Jeroen van Baarsen <jeroenvanbaarsen@gmail.com>

fix redis 3.0.0

Removed "unreleased" from v7.10 changelog

When using MySQL as database backend in GitLab, ``date`` in ``date(created_at), count(id) as total_amount``
won't return the ``date`` column (should be ``date(created_at)``), as a result, there's no contribution in the user
profile page.
Adding an ``as date`` can solve this problem.

Version 7.10 is already released so "unreleased" text next to it in the changelog file can be removed.

Fix bug where Slack service channel was not saved in admin template settings

Consolidate allowed parameters in one place to avoid these kinds of bugs in the future.

Closes https://github.com/gitlabhq/gitlabhq/issues/9181
Closes #1501

See merge request !574

Simplify the `skip_before_action` logic for UploadsController

See merge request !547

Improve mobile UI for dashboard and project pages

Some love for mobile UI 😃

## Before
- - -
![Screenshot_2015-04-24-17-42-59](https://gitlab.com/dzaporozhets/gitlab-ce/uploads/827f9cefa477fc7f0d1b2d56e479a35c/Screenshot_2015-04-24-17-42-59.png)
![Screenshot_2015-04-24-17-27-01](https://gitlab.com/dzaporozhets/gitlab-ce/uploads/698eb90033d40ea7de9f599364a34d0e/Screenshot_2015-04-24-17-27-01.png)

## After
- - -

![Screenshot_2015-04-24-17-16-08](https://gitlab.com/dzaporozhets/gitlab-ce/uploads/7e3ad8bc18800f63a7be20ea31ccfd3b/Screenshot_2015-04-24-17-16-08.png)
![Screenshot_2015-04-24-17-39-18](https://gitlab.com/dzaporozhets/gitlab-ce/uploads/cde3379836530d95e94922ba5c200cef/Screenshot_2015-04-24-17-39-18.png)
Signed-off-by: Dmitriy Zaporozhets <dmitriy.zaporozhets@gmail.com>

See merge request !573

Consolidate allowed parameters in one place to avoid these kinds of bugs in the future.

Closes https://github.com/gitlabhq/gitlabhq/issues/9181

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

Don't allow username to end in period.

Fixes #2174 and #2249.

cc @jacobvosmaer Please review and test with the GitLab.com dump.

See merge request !1786

Add issue and merge request count for state filters.

Related to issue #2170

Changes relate to project issues and merge request pages, dashboard and group pages remain the same.

See merge request !1747

Make source code on GitLab more prominent.

See merge request !1741

This reverts commit c0116926.

This reverts commit c75c6b84.

Link cross-project cross-reference notes to correct project.

- Fixes #1431: Don't crash when an MR from a fork has a cross-reference comment from the target project on of its commits.
- Include commit comments in MR from a forked project.

To accomplish this, the Commit model needs to know about its project. Adding this attribute also simplifies a bunch of other methods that deal with a note's target, that previously had to have special logic for when it belonged to a commit.

See merge request !554

Tweak issue page a bit