Home page

It looks like http://odi-stg.whiteag5.tryingitout.co.uk/home.html but with different modules:

![home](https://f.cloud.github.com/assets/395050/1376921/4a2467cc-3a9d-11e3-9fc8-ed4a146c3ed6.png)

The configuration is done in `config/sections.yml` which now supports different kinds of modules:

 - `image` and `title` gives a foreground image
 - `image` and no `title` gives a fullbleed image
 - `background_image` gives a background image
 - `frame` gives an iframe which is good for dynamic modules (eg latest blog post)

Current modules shown need to be approved by @brianhoadley and @kcorrick.