[#67549352] add omniauth-facebook
[#67549352] add omniauth initializer
[#67549352] replace facebox with Foundation's reveal
[#67549352] add authorizations controller; add facebook js lib;
[#67549352] fix Facebook omniauth scope
[#67549352] fix Facebook omniauth scope
[#67549352] add Authorization model
[#67549352] add some tests for Authorization
[#67549352] add reveals styles
[#67549352] Fix tests
[#67549352] fix conflict