Set up basic component build process and meta docs
First pass at copying layout stuff from cfgov-refresh
Tidy up a few things

- Have `.content_wrapper` extend `.wrapper`
- Remove `.sidebar_item`; `.block`s should be used instead
- Make cf-grid helpers an official part of this component
Update cf-core to 0.6.0
Remove inline styles no longer needed
Reposition wrapper stuff in cf-grid helpers
Merge pull request #1 from Scotchester/gh-pages

First cf-layout release