make a copy of spacelab theme so we can customise it

Docker-DCO-1.1-Signed-off-by: Sven Dowideit <SvenDowideit@fosiki.com> (github: SvenDowideit)
move the docs headings down a level - tho they might go into the side bar - we'll see how the rearrange goes

Docker-DCO-1.1-Signed-off-by: Sven Dowideit <SvenDowideit@fosiki.com> (github: SvenDowideit)