Hustler has no need for an globals class
Now takes the details in contructor and has a function to save messages to pending
Implemented the send message function
sha1 function wont work, fix this in the future.
Implemented function to send message

i.e. upload it to pending and in the future let servers, e.g. Jessica
know.
ClientUser now has the accessToken and email of the user
Re-impemented the sendMessage function and addMessageToConversation

Cleaner code and no use of the sessionID
Removed the code for displaying the conversation, to be re-implemented
Now starts the callbackBean on page load
Added a class keeping all the GmailModel instances

This is done because of performance reasons.
Added a simple class to handle the REST functionality, client.