Add Angular and Ember

* Move external JS libraries to vendor folder
* Add EmberJS library and index page
* Add AngularJS libraries, application file stub, and index page
Making progress on Angular implementation

* Angular page does not throw any errors currently... which is positive.
No graphs are being displayed, but that will come in the next submit.
* Moved example data sets out to example-data.js so it can be shared
across pages.
Use minified angular files
Basic parts of the angular directives in place

* Nothing special here, just some setup.