thumbnails cleanup: no more UL or LI elements needed, instead just use standard grid markup

docs/templates/pages/index.mustache

@@ -37,7 +37,7 @@
     <h1>{{_i}}Introducing Bootstrap.{{/i}}</h1>
     <p class="marketing-byline">{{_i}}Need reasons to love Bootstrap? Look no further.{{/i}}</p>
 
-    <div class="row-fluid">
+    <div class="row">
       <div class="span4">
         <img src="assets/img/bs-docs-twitter-github.png">
         <h2>{{_i}}By nerds, for nerds.{{/i}}</h2>
@@ -46,7 +46,7 @@
       <div class="span4">
         <img src="assets/img/bs-docs-responsive-illustrations.png">
         <h2>{{_i}}Made for everyone.{{/i}}</h2>
-        <p>{{_i}}Bootstrap was made to not only look and behave great in the latest desktop browsers (as well as IE7!), but in tablet and smartphone browsers via <a href="./scaffolding.html#responsive">responsive CSS</a> as well.{{/i}}</p>
+        <p>{{_i}}Bootstrap was made to not only look and behave great in the latest desktop browsers (including IE8+), but in tablet and smartphone browsers via <a href="./scaffolding.html#responsive">responsive CSS</a> as well.{{/i}}</p>
       </div>
       <div class="span4">
         <img src="assets/img/bs-docs-bootstrap-features.png">
@@ -59,7 +59,7 @@
 
     <h1>{{_i}}Built with Bootstrap.{{/i}}</h1>
     <p class="marketing-byline">{{_i}}For even more sites built with Bootstrap, <a href="http://builtwithbootstrap.tumblr.com/" target="_blank">visit the unofficial Tumblr</a> or <a href="./getting-started.html#examples">browse the examples</a>.{{/i}}</p>
-    <div class="row-fluid">
+    <div class="row">
       <ul class="thumbnails example-sites">
         <li class="span3">
           <a class="thumbnail" href="http://soundready.fm/" target="_blank">