Quick initial integration of software keyboard into KA Lite exercises.
Merge branch 'css_cleanup' into software-keyboard
Tweaks to styling for software keyboard.
Adding other mather notations.
Adding clear input field function.
Fixed "next question" displaying issue
Showing Numberpad
Only show the numberpad if it is an andriod device.
Fix some formats
Signed-off-by: wangguan59 <wangguan59@gmail.com>
Merge branch 'develop' into software-keyboard
Show up on all the devices.
Initialize models for research data saving
Create user via GET parameters.
Merge branch 'release-0.11' of github.com:learningequality/ka-lite into priority_five
First pass model for dumping research data into.
First steps to pre/post-test framework.
Merge branch 'release-0.11' of github.com:learningequality/ka-lite into priority_five

Conflicts:
	kalite/templates/exercise.html
Working API call to fetch JSON bundle of exercise and/or videos.
First pass at student test framework.