Increased model spec coverage

Add milestone API docs to doc/README and views/help/api

Also removes `closed` attribute option from create action.

add docs for Milestones API

Conflicts:
	spec/requests/api/issues_spec.rb

FactoryGirl and spec cleanup

We now need only one seed repo! Also cleans up the seeding script.

Simplified gitolite handle logic
Stubn over monkeypatch
Stub only specific methods in Gitlab:Gitolite
Moved grach auth to lib
added specs for keys observer
removes SshKey role

Fixed some hardcoded paths based on issue #1272

Fixed typo

New config option: git_hooks_path

Improve GFM user docs