More towards optimizations

* Removes react reference from html
* Makes simple optimizations work when on prod. On dev, whitespace optimizations take place. Note that switching to `:none` for the optimizations option won't work, because `:preamble` [does not work](https://groups.google.com/d/msg/clojurescript/r7I1eJwqWWo/8V078QHEWQkJ) with optimization none. 

Need to do:
* someone else test that `lein cljsbuild auto prod` doesn't screw anything up for them, and produces one main.js file out of our clojurescript source, instead of many.
* change `lein deploy` to run `lein cljsbuild once prod` rather than `lein cljsbuild auto dev`