There are occasions where minitest is not bundled in packaged
versions of ruby that some OSes distribute (eg Fedora). Adding
minitest to Gemfile ensures that it gets loaded and tests can run.

Signed-off-by: Axilleas Pipinellis <axilleas@archlinux.gr>

update jquery-atwho-rails to v0.3.0

add autocomplete_source action to project for gfm autocomplete

move init_autocomplete layout from head_panel to project_resource

Prevent gollum to overrride gitlab-grit gem. Use grit as instead so gollum uses it too. Fixes things with gpg singatured commits, etc.

This reverts commit 4524ba20.

A lot of people might have firewalls blocking the git:// protocol. Using https:// makes this easier and matches the other git repositories in the Gemfile.

Github just moved the Gollum repository to it's own organization.
This commit updates the Gemfile to point to the new repo location.

I also added a specific ref pointer to a version that is known to
work well just in case they slip up and break their master branch
right at the same time someone happens to be installing or updating
Gitlab. This is about the safest we can get until they put out the
next release that resolves the Pygments dependency issue.

This commit replaces the old database backed Wiki system with the
excellent Gollum git based Wiki system.

The UI has been updated to allow for utilizing the extra features
that Gollum provides. Specifically:

* Edit page now allows you to choose the content format.
* Edit page allows you to provide a commit message for the change.
* History page now shows Format, Commit Message, and Commit Hash.
* A new Git Access page has been added with the Wiki Repo URL.
* The default page has been changed to Home from Index to match
the Gollum standard.

The old Wiki model has been left in tact to provide for the
development of a migration script that will move all content stored
in the old Wiki system into new Gollum Wikis.