Merge branch 'change-notes-order' of https://github.com/riyad/gitlabhq into riyad-change-notes-order

Repaired Get patch

Fix HTML entities being parsed in GFM

Also fixes the spec so that it actually tests the thing it says it's
testing. Hooray!

Closes #1308

Be more resilient in the case of missing omniauth settings

Should no longer freak out when omniauth settings aren't present in
gitlab.yml. People who aren't using it shouldn't even have to put a
'false' entry in their config for it (and probably wouldn't, after an
upgrade).

Project hooks API

specs DRY up