Signed authentication follow

* Created a Token model
* Moved global admin specific REST logic to oae-rest/lib/api.admin
Merged master.
Merge branch 'master' into signedauthfollowup

* master:
  Compatability with elasticsearchclient v0.3+
Merge branch 'signedauthfollowup' of git://github.com/simong/Hilary into signedauthfollowup
Removed console.log