Calls to .log and .dir can come in before widget fully ready

[alecperkins]

Currently, calling CoffeeTable.log, etc, before the widget has finished loading results in an error since the widget's DOM isn't complete. DOM ready isn't reliable, since the widget is already initializing after DOM ready by default. Calls to the API need to be buffered if the widget hasn't finished initializing. Or perhaps a 'ready' event on the widget that can handle a callback.