Updates, Compass, and new Follow buttons #16

- Updated Jekyll to the latest version and removed deprecated config settings (run with `jekyll serve --watch`)
- Updated the [README](https://github.com/amsrb/amsrb.github.com) with instructions to preview the site locally.
- I updated the follow buttons so they look more modern (RE: #16)

[![](http://img.springe.st/2014_09_15_12_51_55_quy1h.jpg)](http://img.springe.st/2014_09_15_12_51_55_quy1h.jpg)