Improved CSS and HTML of fractions
Moved the closure compile files to its own folder
Merged number_backside.js into number.js
Box frontside and backside operational now

At least it works for one test.
Added a test file that includes everything

JavaScript, CSS, and HTML all in one. Good for testing with Caja
Playground - http://caja.appspot.com/
Test page enhanced

Now includes both number and box robot tests.