IE11 support

There are 28 failing assertions in the master branch in IE11.
When a new 3rd-party library is being added is the best time to bower-ize it. If it takes you more than 30 minutes, I'm cool with punting on it, but it should be quick. You'll make a change [here in load-src.dev.js](https://github.com/wymeditor/wymeditor/blob/master/src/test/load-src.dev.js#L68), to [bower.json](https://github.com/wymeditor/wymeditor/blob/master/bower.json) and to include bower_componenets/jquery-browser in [concat](https://github.com/wymeditor/wymeditor/blob/master/Gruntfile.js#L206).