Group site links on 'docs' page into hopefully-logical sets

Author: tjgrathwell

lib/step.rb

@@ -185,7 +185,7 @@ def goal *args
 
   def site_desc site_name, description
     div class: 'site-desc' do
-      h1 do
+      h2 do
         a href: "/#{site_name}" do
           text Titleizer.title_for_page(site_name)
         end

public/css/step.css

@@ -298,5 +298,9 @@ table.bordered tr {
 }
 
 .site-desc p {
-  margin: 5px 0 0 0;
+  margin: 0;
+}
+
+.site-desc h2 {
+  margin: 25px 0 5px 0;
 }