Super massive docs overhaul

* Bring back the navbar up top
* Pull the docs content back into separate pages because a 6.6k line docs file is just crazy
* Recenter the page content and bring back affixed side nav (needs work)

docs/assets/css/bootstrap.css

@@ -3304,7 +3304,7 @@ button.close {
   float: right;
 }
 
-.nav .divider {
+.nav .nav-divider {
   height: 2px;
   margin: 9px 0;
   overflow: hidden;