Don't require the whole hogan.js in templates

Changed it so the generated template modules only require Hogan's [template module](https://github.com/twitter/hogan.js/blob/master/lib/template.js) (instead of the whole [hogan.js package](https://github.com/twitter/hogan.js/blob/master/lib/hogan.js)).

This basically excludes the whole [compiler module](https://github.com/twitter/hogan.js/blob/master/lib/compiler.js), which isn't needed on the frontend.