Add inuit.css submodule
Add inuit.css web template
Prepare inuit extend directory

This directory is used for making any alterations to inuit without hacking the core.
Add this includes directory
Enable nav module
Merge pull request #1 from peterwilsoncc/PW/inuit-css

I'll merge this in for now seeing you've been busy :) I will need to get you to explain the assets/child/ structure when we catch up next because I don't understand why this exists when we're working on a parent theme. I'll add that to the notes for the next catch up :)

>Inuit.css is very heavy with comments by default, it's recommended to be compiled in compressed mode. Did I read somewhere this is against the .org requirements?

I don't think that's a bad thing. I'll ask the theme team in San Fran to make sure though.