New layout
New layout
Merge branch 'develop' into new-ui
Two columns
Merge branch 'develop' into new-ui
Two column layout changes
Merge branch 'develop' into new-ui
New UI
Merge pull request #7 from benetech/develop

Develop
Merge branch 'develop' into new-ui
IMG-626 Move to backbone.js for editing a book. Two columns instead of frames
IMG-617 Remove frames, move to backbone.js for editing a book. A lot more to come.
IMG-619 Filters and navigation for left nav
IMG-611 Next and previous buttons
Reorganize code
IMG-626 a lot of clean up. Save needs description, image category, and description. Add preview view.
IMG-612 Prevent collapsed nav. Handle duplicate images. Handle changes made by other users since load.
IMG-623 Show view sample link for categories with samples
IMG-616 add title section to book content
FIx training module links. Fix accessibility erros on edit book page.