Updated the location of the users list

Apparently the location of the users list has changed and this script has not been updated to show that. The help for this script also says that it will mention every person in the room. This will in fact mention everyone on the server.

Author: frenchtoast747

src/scripts/yell.coffee

@@ -21,7 +21,7 @@ module.exports = (robot) ->
   _ = require 'underscore'
 
   robot.respond /yell (.*)/i, (msg) ->
-    users = _.reject((_.values _.pluck robot.brain.users, 'name'), (name) -> name == msg.message.user.name)
+    users = _.reject((_.values _.pluck robot.brain.data.users, 'name'), (name) -> name == msg.message.user.name)
     msg.send if users.length then users.join(', ') + ": #{msg.match[1]}" else "If a tree falls in a forest and no one is around to hear it, does it make a sound?"