Changed QraatUser to work with django admin, added ModelBacked to Authenticate
Added transmitters models to hello/models, added comments to qraat_auth/models, Added djago's default userbackend to settings
Added create_transmitter test, fixed transmitter type_info field
Added admin track, sitelists, and tx forms
Changed TxInfo string presenter
Merge branch 'alisha' into jey_qraat_site_0.1