Added an optional thumbnail to blocks
Merge pull request #60 from DanBurton/block-thumbnails

Added an optional thumbnail to blocks
Fix schema and css
Add a block navigator to pages#show
Merge pull request #61 from dhawt/pages_subnav

Pages subnav
Update block nav DOM for pages#show
Cleanup test and move thumbnail styling logic to helper.
Merge pull request #63 from dhawt/page_nav_changes

Update block nav DOM for pages#show
Remove .thumb div on block nav, use larger-resolution thumbnail image for nav.
Merge pull request #64 from dhawt/tweak_block_thumbnail

Remove .thumb div on block nav, use larger-resolution thumbnail image for nav.
Add title field to blocks so we can use it in page nav instead of ugly css names.
Merge pull request #65 from dhawt/blocks_have_title

Add title field to blocks