Added constraints to RZCreateParyViewController in the Storyboard.
Refactored the delegate call for RZClientDelegate to send the RZ_CONTENT_TYPE of the data that successfully/failed to send. Added a getter for the contentType on RZNetworkUpload. Fixed bug where spinner would not go away in RZCreatePartyViewController after triggering song send and spamming play messages.
Made client change colour when it receives a song/starts playing/pauses a song