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
- [ ] Clean up application.scss
- [ ] Make sure this works in production 
Probably don't want this checked in.  Since it's large, I think you can force push this out of the history:

* `rm -rf .bundle`
* `echo .bundle >> .gitignore`
* `git rm .bundle`
* `git add .gitignore`
* `git commit --amend # modify the current head commit so this file was never there`
* `git push --force origin feature/jekyll-asset-pipeline-attempt`

I *think* this'll do it.