Update time zone rake task for production. Resolves #8387

Conflicts:
	GITLAB_SHELL_VERSION

Security release ownership

We saw the following problems around the 7.4.4 release:

- the fix got merged into master while it should have been held back
- there was a security fix but no release manager to release it

With this change we want to improve our process and documentation
to prevent situations like this in the future.

See merge request !1273

Backup cron mode

If you have your server configured to receive emails containing the output of
cron jobs it is annoying to get long spammy emails from the backup script. This
change adds a 'cron mode' that makes the backup script silent unless something
goes wrong during the backup.

See merge request !1268

start gitlab after mysql tweaks

Add missing timestamps to the 'members' table

In 20140914145549_migrate_to_new_members_model.rb we forgot to set the
created_at and updated_at times for new records in the 'members' table. This
became a problem after commit c8e78d97 which
was added in GitLab 7.5. With this migration we ensure that all rows in
'members' have at least some created_at and updated_at timestamp.

See merge request !1272

Possibility to create Milestones or Labels when Issues are disabled

https://dev.gitlab.org/gitlab/gitlabhq/issues/1682

See merge request !1270

Add GitLab shell update to update guide

See merge request !1269

Rebuild keys

This was clearly lacking for the documenation.

See merge request !1267

Improve mobile UI. pt1

Related to #1493

* [x] App Header
* [x] Dashboard
* [x] Project home page

See merge request !1266

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

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

Increase font size

Increase markdown typography font size to 15px.

Affected:

* wiki
* issue/mr description
* md files
* comments

Fixes #1662

See merge request !1265

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

Small improvement to /api/user/keys docs

Hide gpg signature

Fixes #1743

See merge request !1263

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

Bump gitlab git

See merge request !1261

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

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

Fix tests

See merge request !1262