feat($goQuery): Experimental intergration of Query

$goQuery is a service built on `key.query()`.  It accepts a key, room,
filter and options.  It returns a QueryModel. The Model has the standard
`$sync` method which keeps the models value current with that of the
query result set.

```js
	angular.module('ChatApp').controller('ChatCtrl', ['$scope', '$goQuery', function($scope, $query) {
	  var filter = { “sender”: { “$eq”: “GrandMasterLivingston” }};
	  var sort = { “$name”: “desc”};
	  var limit = 20;
	  var options = { sort: sort, limit: limit };

	  $scope.chat = $query('messages', filter, options);
	  $scope.chat.$sync();
	}]);
```

Related: #48