* try circleci

* add new circle ci badge

Added lines 227 to 231 to remind folk to install gcc / Apple's Command Line for Tools for Xcode if user hasn't either installed.

and what to look for in cars you want to use.

Also add a link to said document.

fixes #220

Correct spelling mistakes.

Probably want to delete gitconfig otherwise people will be submitting changes to their cloned repos as will roscoe :D

Update login and network location to match the current pre-built install that is referenced at the beginning of the tutorial.

* fix edit on github links in mkdocs

* update parts links

* initial commit of hardware build docs

* bit of cleanup, and 3dp links

* testing anchor links in ToC

* added finished donkey pic, and all ToC anchor links