update fluid layout to use variable for sidebar width

bootstrap.css

@@ -6,7 +6,7 @@
  * http://www.apache.org/licenses/LICENSE-2.0
  *
  * Designed and built with all the love in the world @twitter by @mdo and @fat.
- * Date: Sat Jan  7 03:37:53 PST 2012
+ * Date: Sat Jan  7 03:52:42 PST 2012
  */
 html, body {
   margin: 0;

lib/scaffolding.less

@@ -32,15 +32,15 @@ body {
 
 // Sidebars (left and right options)
 .fluid-sidebar {
-  width: 220px;
+  width: @fluidSidebarWidth;
   margin: 0 20px 18px;
 }
-.sidebar-left   { padding-left: 260px; }
-.sidebar-right  { padding-right: 260px; }
+.sidebar-left   { padding-left: @fluidSidebarWidth + 40; }
+.sidebar-right  { padding-right: @fluidSidebarWidth + 40; }
 
 // Float the sidebars accordingly
-.sidebar-left .fluid-sidebar   { float: left; margin-left: -240px; }
-.sidebar-right .fluid-sidebar  { float: right; margin-right: -240px; }
+.sidebar-left .fluid-sidebar   { float: left; margin-left: (@fluidSidebarWidth + 20) * -1; }
+.sidebar-right .fluid-sidebar  { float: right; margin-right: (@fluidSidebarWidth + 20) * -1; }
 
 // The main content area
 .fluid-content {

lib/variables.less

@@ -43,6 +43,9 @@
 @gridGutterWidth:   20px;
 @siteWidth:         (@gridColumns * @gridColumnWidth) + (@gridGutterWidth * (@gridColumns - 1));
 
+// Fluid width sidebar
+@fluidSidebarWidth:	220px;
+
 
 // THEME VARIABLES
 // ---------------