[RFC] Browserify

### Setup

1. `npm install -g browserify`
2. `browserify src/client/app/js/app.js -o dist/js/app.js`

### TODO

- [ ] Discuss, otherwise the rest shouldn't be done.
- [ ] `grunt browserify` task (the existing NPM module sucks).
- [ ] `app.templates` doesn't quite fit in with `require`, since it is compiled.