Add images and logos.
Modify Bootstrap variables for our design. Also reduced the grid size since 940px seems too wide for the amount of content we have to display.
Initial checkpoint on new design.
Render the Active Assets table.

MVP at this point, but it does populate from the database.
Merge branch 'master' into screenly-ui
Merge branch 'master' into screenly-ui
Improve documentation and code style
Use the new get_assets_grouped() method to get a list of the active and inactive assets for use in rendering the index template.
Add Underscore and Backbone, which we'll need for the interactive index page.
Start Javascript for interactive index page.
Add simple API for obtaining a list of Assets.
Create Backbone collections for Assets, ActiveAssets, and InactiveAssets.

These are populated automatically via AJAX on page load.
Remove unneeded variable.
Change variable name since we're now using the get_assets_grouped() method.

@vpetersson This is like the reason for the rendering bug.
Merge branch 'master' into screenly-ui
Update bottle-haml to 0.1.4. I pushed a slight change.
Augment the JSON dumper to turn datetimes into ISO strings.
Start work on views.

Active and Inactive assets views are now dynamically rendered based on the assets which are retrieved via Backbone. The "Activate" and "Deactivate" links will actually move an asset from one section to another but nothing actually happens on the backend yet.
Use the new json_dump method with support for datetime
Fix some HTML markup mistakes.