Redesign editor with PBS code

Draft to replace the page editor with HTML5-Storybook, written for PBS Kids: https://github.com/PBS-KIDS/HTML5-Storybook

Things we can use:
* structured pages / templates of where to put text and images
* Paint activity
* tablet friendly UI
* book preview with turnable pages (replaces turn.js)

Things to add:
[x] editable text
[x] different languages in editable text
[x] adding and navigating pages
[x] save text
[x] fix text highlight plugin
[] save images
[] move text areas and images around
[] save a page template to user and team

Also in the library (not included in iLoominate)
* animations and sounds