compass switch

I am creating the pull request but it's not ready, so please don't merge it.

I would like to discuss about the presence of some files before making cleanup. Please let me know it is safe to remove them.

* **bootstrap**: I will move necessary js files under `js` folder and remove this folder.
* **img**: No reference to this folder anymore, so it will be removed.
* **less.watchr**
* **reformed.css**: no reference to this file. Is it used?
* **reset.css**: compass has a helper for this and I used it. No longer needed but there are references to this file from `app.html` (in comments) and `index_original.html`. BTW, `index_original.html` is a project file or just for backup?
* **styles.css**: no reference to this file. Is it used?
* **usergrid.less**: I was about to remove it but there is a reference from `app.html` file. Again, I don't understand the existence of `app.html`. It has some broken references like `js/app/client.js`. I don't understand why `less.js` used. Can I remove it too?