Feature/jekyll asset pipeline attempt

### Goal:
cleaner organization of assets and better long-term asset handling

### How? 
[jekyll-assets gem and plugin](https://github.com/ixti/jekyll-assets)
[bower package manager for assets](http://bower.io/)

### Steps
- [x] Implement jekyll-assets
- [x] Implement bower
- [x] Use bower to serve humble kit css framework
- [x] Arrange assets for rails-like asset pipeline
- [x] Clean up application.scss
- [ ] Make sure this works in production