This commit fixes the regression caused by using a newer version of Grape and Grape entity.  This solves Issue 4023.

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.