Add javascript testing to travis
Add js tests
Call runtests script explicitly with sh
Make runtests be a python script
Install javascript extensions
Merge pull request #24 from jhamrick/add-js-tests

Add js tests
Update metadata on change rather than on keyup
Test for change event instead of keyup event
Merge pull request #19 from jhamrick/fix-bugs

Update metadata on change rather than on keyup
Add preprocessor to make cells undeletable