front page docs updated to include old getting started section, update code styles to look like github gists, and lots more docs updates

lib/navbar.less

@@ -53,6 +53,11 @@
   }
 }
 
+// Navbar forms
+.navbar-form {
+  margin-bottom: 0; // remove default bottom margin
+}
+
 // Navbar search
 .navbar-search {
   position: relative;