Jl comment help

Some improvements/things left:
- ui feedback is currently un-animated. Might be worth adding some kind of animation if you're interested.
- need some way to get current user's name to add to the comment (see my note in the javascript controller)
We could make this more interesting, btw. We could add animations, and ideally, icons to help illustrate the actions more visually. My personal favorite free icon set is [ionicons](http://ionicons.com).