Migrate documentation to MkDocs proper
Fixed typos in the config and updated Google analytics
Remove redundant requirements file
Add the kickstarter annoucement to the TOC
Add a docs build to the Tox run
Change site_dir to html to match mkdocs.py
Remove the site ignore which isn't needed as we will use the html output
directory as before
Drop simply from the mkdocs install lines

It is still simple tho', honest ;)
Use page_title instead of title in docs theme
Fix the Navigation style
Bring back the promo section
Add next and previous page.
Fixed the TOC (again)

Not sure how I broke it ;-)
Add a workaround for not having the index name
Add meta description
Move nav to it's own template based on the MkDocs theme
Correct the capitalisation of API
Move the docs theme out of the docs folder.
Fixed copypasta fail
Add validators from 27622058872c00e357deb7d7e86619a793ef4b41 and
254701230d85612cf0210d4549c2d74f410a181d