#199 link editor

app/webroot/js/bootstrap-wysihtml5.js

@@ -554,6 +554,7 @@ _initParser:function(){this.observe("paste:composer",function(){var a=this;a.com
                 var newWindow = targetInput.prop("checked");
                 self.editor.composer.commands.exec("createLink", {
                     'href' : url,
+                    'rel' : 'external',
                     'target' :'_blank'
                 });
             };