overhaul docs on sub pages, clean up css and copy

docs/templates/pages/getting-started.mustache

@@ -1,10 +1,14 @@
+</div>
 <!-- Masthead
 ================================================== -->
 <header class="jumbotron subhead" id="overview">
+  <div class="container">
   <h1>{{_i}}Getting started{{/i}}</h1>
   <p class="lead">{{_i}}Overview of the project, it's contents, and how to get started with a simple template.{{/i}}</p>
+</div>
 </header>
 
+<div class="container">
 <div class="row">
   <div class="span3 bs-docs-sidebar">
     <ul class="nav nav-list bs-docs-sidenav">