fix ie7 breadcrumbs per #2224

docs/assets/css/bootstrap.css

@@ -2882,6 +2882,10 @@ button.btn.btn-small, input[type="submit"].btn.btn-small {
 }
 .breadcrumb li {
   display: inline-block;
+  *display: inline;
+  /* IE7 inline-block hack */
+
+  *zoom: 1;
   text-shadow: 0 1px 0 #ffffff;
 }
 .breadcrumb .divider {

less/breadcrumbs.less

@@ -11,6 +11,7 @@
   .box-shadow(inset 0 1px 0 @white);
   li {
     display: inline-block;
+    .ie7-inline-block();
     text-shadow: 0 1px 0 @white;
   }
   .divider {