Reviewed Additional Javascript Tests

@clarkbarz reviewed the javascript tests in pull request #128, which was requested in #127. 
There is a typo in the code then: https://github.com/fusionbox/django-widgy/blob/master/widgy/static/widgy/js/nodes/base.js#L17

https://github.com/fusionbox/django-widgy/blob/master/widgy/static/widgy/js/nodes/base.js#L224