Nix prepublish for now

:/

Will revisit when we're deploying sites with Buckets _module_ to Heroku, instead of Buckets repo itself.
Change minify task to prepublish for Heroku
Fixes for buckets as an NPM module

* Wrap in an index.js for people without coffeescript
* Nixes the "buckets:" key for config, brings everything up (easier to merge)
* Convert 'buckets' module to simply return app for now (for grunt express, will nix soon I think)