Add hero banner to styleguide
Improved parallax
Code review
Merge pull request #696 from lonelyplanet/jesus/improve_parallax

Improved performance of parallax and add hero banner to styleguide
Added documentation for the debounce JavaScript helper function.  Also reorganized the js-component names alphabetically in the controller, helper, and routes files.
Merge branch 'srb-debounce-docs' of https://github.com/lonelyplanet/rizzo into srb-debounce-docs