Merge pull request #1 from jpadilla/pr/1983

Use page_title instead of title in docs theme
We can now specift MkDocs 0.10
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
Use MkDocs meta.source to render source code links