Adds a css class (noborder) for making borderless tables text formatting.

git-svn-id: svn+ssh://rubyforge.org/var/svn/redmine/trunk@8862 e93f8b46-1217-0410-a6f0-8f06a7374b81

public/stylesheets/application.css

@@ -765,6 +765,8 @@ div.wiki table, div.wiki td, div.wiki th {
     padding: 4px;
 }
 
+div.wiki .noborder, div.wiki .noborder td, div.wiki .noborder th {border:0;}
+
 div.wiki .external {
     background-position: 0% 60%;
     background-repeat: no-repeat;