Adding options callback function that will run after the debounced "r…

…esize" event completes...

Updating item initialization process to maintain order of elements...

Adding callback methods for loaded, before transition, and after tran…

…sition events...

Adding custom navigation element functionality... Updating README.md...

Adding "disabled" markers when non-infinite carousel reaches the end.…

….. Updating demo... Updating README.md...