Browserify everything; use gulp instead of make

@campaul can you give this a look to make sure I haven't gone crazy?

* [x] fix merge conflicts
* [x] bring back livereload for development (should be simple)
* [x] stop bunding React in the final build? probably need to shim both React and jQuery (use global versions if present; `require()` if not present)
* [x] Export some global namespace for cretins
* [ ] Figure out how to package the jQuery plugin the right way