Emit messages on connect and disconnect

Author: rickerbh

lib/databases/firestore.js

@@ -45,12 +45,14 @@ _.extend(Firestore.prototype, {
     var self = this;
     var options = this.options;
     self.db = new gcFirestore(options);
+    self.emit('connect');
     if (callback) callback(null, self);
   },
 
   disconnect: function (callback) {
     var self = this;
     delete self.db;
+    self.emit('disconnect');
     if (callback) callback(null, self);
   },