Version 0.1
Initial release
Version 0.2
Added Hint functionality
Improved XML parsing
Added XML schema version
Added ability to customize labels for student and expert answers
Fixed a bug that prohibited having two submit-and-compares on one page
Version 0.3
Added workaround for xblock student data bug
Version 0.4
Added option to specify label on submit and compare button
Version 0.5
Added grading to the xblock