Allow audience to include multiple mentions, including individual user mentions

lib/bot/setAudience.js

@@ -5,7 +5,8 @@ var models = require('../../models');
 var _ = require('underscore');
 
 function setUserGroup(bot, message) {
-  log.verbose('Heard a request to set an audience');
+  log.verbose(`Heard a request to set an audience to ${message.match[2]}`);
+
   // Currently, bots cannot access the usergroups api endpoint, so we can't check
   // See https://api.slack.com/bot-users
 
@@ -36,7 +37,7 @@ function setUserGroup(bot, message) {
           }
         }
       ).then(function (){
-        bot.reply(message, ':thumbsup: Set audience to `'+message.match[2]+'`. If you\'re using a '+
+        bot.reply(message, ':thumbsup: Set audience to `' + message.match[2] + '`. If you\'re using a '+
         'user group, make sure that it exists');
       });
     } else {
@@ -47,7 +48,7 @@ function setUserGroup(bot, message) {
 }
 
 function attachListener(controller) {
-  controller.hears(['(usergroup|audience) (<!(subteam|here|channel).*?>)'],['direct_mention'], setUserGroup);
+  controller.hears(['(usergroup|audience)\\s+((?:[^>]+>[\\s;,]*)+)'],['direct_mention'], setUserGroup);
   log.verbose('Attached');
 }