Add presenter structure and presenters for page, block, layer, image layer, and keyframes
Add custom formatting for attributes to get correct CSS
Rename presenters to 'view objects'
Remove block and page view objects, render layers in partials
Cleanup styling an JS, remove cruft
Remove bad ref to public stylesheet in pages#show
Refactor view objects to better utilize helpers, abstract into additional partials.
Remove extraneous _layer partial; put partial name determination logic directly in block partial.
Clean up layer partials and view_objects a bit more.
Merge pull request #25 from dhawt/skrollr_integration

Skrollr integration