Upgrade Grails and plugins
Upgrade to Grails 2.2.2
Fix merge error in application.properties
Fix property constraint in Message class
Canceling websocket feature for now.  Just mearging the cleanup and dep. updates included in this branch.
Merge branch 'feature/websocket' into develop

* feature/websocket:
  Fix property constraint in Message class
  Fix merge error in application.properties
  Upgrade to Grails 2.2.2
  Upgrade Grails and plugins