show list of requests on Thank You step
refactoring currentUser with promise chaining
refactoring receiver flow - ask permissions only when required
refactored CurrentUser api to use promises for all its methods
refactoring receiver controller to postpone permission request
updated bower packages to latest (angular, fire, ng-upload, underscore, etc)
refactored and cleaned up CurrentUser. Now returns a new promise based api. Save user info when get it from Facebook
refactored bunch of services to use promises. Updated flows