Added beginnings of Omniauth integration

-Added OnmiAuth initialization file
-Added OmniAuth gem and omniauth-github
Added Session controller and User model

-User model keeps track of system users
-Session is reponsible for authenticating and de-authenticating users
-Added login routes
Added Authorization model

-Keeps track of all valid authorizations (github, facebook, twitter, google, etc...) a user has, so they can login using multiple services
Finished up authorization setup

-Added User and Authorization DB tables
-"Protected" Simple/display behind authorization methods
-Added a convinience method to check if a user is logged in or not
Merge branch 'master' of github.com:BruceEckel/OpenSpacesBoard

Conflicts:
	db/schema.rb
Merge pull request #4 from jcerise/master

Authorizaiton setup