Automatic Anchor Compilation

We're using a slightly different compile workflow now, which
allows us to use an experimentl branch of the Markdown compiler
which will automatically add IDs to all headers, allowing
for free linkable items.

The contribute documentation has been updated to match.
Merge branch 'marked-anchors' into sidebar-links
Domain Sidebar
Moar Sidebars

Added sidebars for the rest of the guides.