restricted 'stop existing running timers' only if the new status in question has tracking as true... dumb mistake before
added pagination to groups show page
got 'done' and 'in progress' labels in; they also update when triggered by 'stop timer' js
added validates_uniqueness_of username and updated related views and controller
styled alerts, notices and pagination
added validation (presence and uniqueness) for group name
added basic styling to user sign-up and edit forms
added 'body cannot be empty' validation to status
Merge branch 'staging'