udpated status message when inserting a guest
udpated status message when inserting a guest

Reviewed in https://codereview.appspot.com/20170045/

ncapito/hackathon,felipecembranelli/GAE-Angular-HelloWorld,googlearchive/appengine-angular-hello-world-python,felipecembranelli/GAE-Angular-HelloWorld,felipecembranelli/GAE-Angular-HelloWorld,ncapito/hackathon,rockwotj/appengine-hangman,rockwotj/appengine-hangman,ncapito/hackathon,ncapito/hackathon,googlearchive/appengine-angular-hello-world-python,rockwotj/appengine-hangman,googlearchive/appengine-angular-hello-world-python,felipecembranelli/GAE-Angular-HelloWorld,googlearchive/appengine-angular-hello-world-python