Extended users API to support updating and deleting users.

Also added tests.
Don't setuid the repositories on installation
Don't setuid the repositories (Rake checks)
Fix gitlab:check recommendation

Running the recommendation would give out:
GNU find: paths must precede expression
Update config/database.yml.postgresql

This was necessary following the installation guide for ubuntu 10.4 with postgres
Fixed a grammar mistake in alert-message.block-message
Switchable the main branch on network graph
Expose MergeRequest object as a notable in the API to allow for easy retrieval of comments
Merge pull request #2837 from xudiera/master

Fixed a grammar mistake in alert-message.block-message
replace right with pull-right
Improve overlap of lines in network graph
remove old alert messages
a bit of split up for gitlab-bootstrap
Fixed link_to_member
Few usability improvments
Merge branch 'refactor/css' of dev.gitlabhq.com:gitlab/gitlabhq
Displaying commit on a new window, when clicking commit on network graph.
Fix wrong path of features.
Merge pull request #2823 from hiroponz/switchable-branch-on-network-graph

Switchable the main branch on network graph
Merge pull request #2847 from hiroponz/improve-overlap-lines

Improve overlap of lines in network graph