Reviewed Additional Javascript Tests

@clarkbarz reviewed the javascript tests in pull request #128, which was requested in #127. 
Comes back with this error: 
Modal Static Functions should handle an ajaxError with responseText Object:
     SyntaxError: Unexpected token o
      at Object.parse (native)
      at Object.ajaxError (/home/zach/repos/django-widgy/widgy/static/widgy/js/modal/modal.js:54:23)
      at Context.<anonymous> (/home/zach/repos/django-widgy/js_tests/tests/test_modal.js:63:13)
      at callFn (/home/zach/repos/django-widgy/js_tests/node_modules/mocha/lib/runnable.js:223:21)
      at Test.Runnable.run (/home/zach/repos/django-widgy/js_tests/node_modules/mocha/lib/runnable.js:216:7)
      at Runner.runTest (/home/zach/repos/django-widgy/js_tests/node_modules/mocha/lib/runner.js:373:10)
      at /home/zach/repos/django-widgy/js_tests/node_modules/mocha/lib/runner.js:451:12
      at next (/home/zach/repos/django-widgy/js_tests/node_modules/mocha/lib/runner.js:298:14)
      at /home/zach/repos/django-widgy/js_tests/node_modules/mocha/lib/runner.js:308:7
      at next (/home/zach/repos/django-widgy/js_tests/node_modules/mocha/lib/runner.js:246:23)
      at Object._onImmediate (/home/zach/repos/django-widgy/js_tests/node_modules/mocha/lib/runner.js:275:5)
      at processImmediate [as _immediateCallback] (timers.js:336:15)