Saving auth token to user defaults now decoupled from delegate notification
Move from delegate callback API to completion block based API for requesting access
Ignore user specific files
Add NSError object to response dictionary if Facebook returned an error
Remove -facebook:tokenResult: from PhFacebookDelegate

No longer needed after switching to API with block-based completion on login
Improve error handling and ensure invocation of login completion handler when network is down or server does not respond
Remove obsolete method from header file
Allow for providing request parameters to synchronous requests

Do not need it yet for asynchronous requests. Might implement later.