Drupal.behaviors needs to be an object with an attach function

Again, this should be for the 7.x branch.

Currently, the code reads

Drupal.behaviors.betterMessages = function (context) {
  fun stuff here ....
}

But I'm pretty sure that it should read

Drupal.behaviors.better_messages = {
  attach: function (context) {
    fun stuff here....
  }
}