Segregate js and css

Segregated and tested with the asset pipeline.  I basically segregated *everything* and did not try to get any reuse of assets between the platforms.  From experience to date, that makes sense with how the app is architected.

So all of the default assets are in app/assets/javascripts/default/... and app/assets/stylesheets/default/...; the kiosk assets are in app/assets/javascripts/kiosk/... and app/assets/stylesheets/kiosk/... .  I did not do any further segregation of images at the moment; kiosk images were already in their own subfolder.