Twit 02 Retrieve user twitter home stream

Creates a generic parser and requester. Performing a request against the REST api now requires the correct pair. 

Example:
To request the twitter android dev stream, the request requires the TwitterObjectRequester (Twitter responds with a JsonObject) and the TweetsHashTagParser to parse the Json object.


if you name your tags after the class, maybe `TAG = AuthenticationActivity.class.getSimpleName()`. Then if you rename your class, this will be updated too