Practice widgets scaffolding
Copy relevant files from pls
Add AGPL header
Practice widget partially done (html only, simple question only)
Added multipart support to practice widget and some basic navigation
Practice widgets can now use lists, have better solution support
Better answer choice formatting & blank answer prevention
Added javascript support for widget
Allow blank answers, allow users to click on labels to select radio buttons
Added option to use minimalistic layout for embedding
Prevent user from clicking button to main page in minimalistic layout
Fix layout when not specifying embed option
Added practice widget tests
Added seed passing
Fixed parameter passing through requests
Added google analytics tracking to practice widget
Added missing require and more includes
Eliminated a repetition
Fixes some mathjax rendering errors
Merge pull request #217 from Dantemss/mathjax_fix

Fixes some mathjax rendering errors