Add HipChat notifier role.

lib/util/logger.js

@@ -106,6 +106,15 @@ Logger.Level = {
 , FATAL: 6
 }
 
+Logger.LevelLabel = {
+  1: 'DBG'
+, 2: 'VRB'
+, 3: 'INF'
+, 4: 'WRN'
+, 5: 'ERR'
+, 6: 'FTL'
+}
+
 Logger.globalIdentifier = '*'
 
 Logger.createLogger = function(tag) {