renamed error_messages in the messages views
added view for fetching top 5 error messages
ordering alert messages to display the lastest 5 alerts
changed view all messages button on admin_dashboard to view all alerts
removed console logging
changed alert messages color to red
fixed all the tests
renamed some variables in the test for error messages
Merge branch 'master' of https://github.com/unicefuganda/rapidsms-edtrac