incorporated idea from @markdotto in #138

lib/patterns.less

@@ -742,9 +742,6 @@ input[type=submit].btn {
   .content {
     background-color: @white;
     padding: 14px;
-    min-width:inherit;
-    max-width:inherit;
-    margin:auto;
     .border-radius(0 0 3px 3px);
     .background-clip(padding-box);
     p, ul, ol {

lib/scaffolding.less

@@ -90,11 +90,11 @@ body {
 .container-fluid {
   padding: 0 20px;
   .clearfix();
-  .sidebar {
+  > .sidebar {
     float: left;
     width: 220px;
   }
-  .content {
+  > .content {
     min-width: 700px;
     max-width: 1180px;
     margin-left: 240px;