Promote proper use of css specificity

static/custom/css.template

@@ -1,5 +1,8 @@
 /*
-  You may have to use !important to override css attributs, for example:
+  custom css files are loaded after core css files. Simply use the same selector to override a style.
-  
+  Example:
-  * {color: blue !important;}
+      #editbar LI {border:1px solid #000;}
+    overrides
+      #editbar LI {border:1px solid #d5d5d5;}
+    from pad.css
 */