Renamed Base library CSS utility methods namespace into ml.base.dom.css, because they are target to manipulate DOM nodes. Therefore, reasonable to keep them under ml.base.dom namespace.
Reworked app mediator using goog.PubSub constructor. Mediator has all the methods constructor provides.
Moved Module API methods into its constructor prototype.
Moved Sandbox API methods into its constructor prototype.
Added application root namespace with the only public method to boot the whole thing.