reworked tabbed interface

* Reworked Tabbed Interface to be remove Carousel plugin requirement
* Reduced code by 75% since it incorporated carousel requirements
* Added all ARIA functionality
* Leverage ARIA Roles as primary logic points allowing for more markup freedom
* Introduced Init state
* Demonstrated progressive enhancement with .no-js leveraging and  "inited" state CSS styling
* Removed all styles and only added core structure to base

TODO: Bring back examples and example CSS into .hbs files
ACTION ON MERGE: Delete the carousel plugin since it can be achieved with the tabbed interface.