turn docs navbar into left navbar
new subnav on all pages
holy crap new docs layout separate from home, no more top navbar
none of that
rejigger some content and start exploring section headings
move nav into partial; rejigger content some more
remove nonexistant example
correct page title and nuke liquid description
dat red
clearer js instructions on how to include plugins
mo padding on side nav links
add link to github project on getting started section
Merge branch '3.0.0-wip' into bs3_new_nav