added property for google image url.  updated google image request method
apply google id and image url when signing in via google
go through google plus sign in if user selects google plus photo without signing in via google. request photo at completion of sign in.
added property on profile for suggested tags from social networks
prevent twitter hash tags from entering more than once in suggested tags list
populate suggested tags from twitter during twitter registration
populated suggested tags from social networks
layout tags on viewDidLoad rather than loadView
fetch suggested tags from social networks only if necessary
add tag to profile tag list if selected, remove if not