Fixed everything mike fucked up
Remove "you" checkbox on create post activity. Users can just check
whether or not they want to post anonymously.
Add LoginResponse, User, and JsonParser classes.

JsonParser parses the raw json returned from a login webservice call and
returns a LoginResponse object. LoginResponse contains an error code, a
User object, which encapsulates all the user details, and a session
token. The app doesn't store the token yet, it just tells you whether
your credentials are correct.