Chatter Box V1

* [x] Extract out to module with controller and partial
* [x] Attempt toggle online/offline
* [x] basic remove content - is this needed?
* [ ] Add functionally 
* [ ] Ready for review 
{code}
var scoresRef = new Firebase(URL_TO_SCORES);
var score = 10000000000; // enough to put me in the #1 position!

// we sort the scores in descending order, so use a negative score for the priority ordering
scoresRef.child('kato').setWithPriority( score, -score );

// retrieve the top 10 scores
scoresRef.limitToLast(10).once('value', function(snap) {
   var i = 0;
   snap.forEach(function(userSnap) {
      console.log('user %s is in position %d with %d points', snap.key(), i++, snap.val());
   });
});
{code}