Instead of floating the sidebar, we want it to be stick so that the
footer doesn't cover the bottom of the sidebar.
Signed-off-by: Andrew Rynhard <andrew@andrewrynhard.com>
This adds the logic for handling multiple versions of documentation, and
adds a copy of the v0.2 docs as a starting point.
Signed-off-by: Andrew Rynhard <andrew@andrewrynhard.com>