updated dependencies, docs, and bootstrap-stylus

Updated dependencies, docs, and bootstrap-stylus.

## Notes: 

* bootstrap-stylus is not an NPM module but will be after the v3 release and will include nib support (see: https://github.com/Acquisio/bootstrap-stylus/issues/5)

* connect-assets v3 is going to have major changes (see: https://github.com/adunkman/connect-assets/tree/v3)