removed starting - of filenames

lib/util.js

@@ -259,6 +259,10 @@ module.exports = {
       // replace all the slashes and if the url is too long
       // cut it and add a small md5
       name = urlComponents.pathname.replace(/\//g, '-');
+      if (name.lastIndexOf('-', 0) === 0) {
+        name = name.slice(1, name.length);
+      }
+
       if (name.length > lengthBeforeCut) {
         name = name.slice(0, lengthBeforeCut);
         name = name + crypto.createHash('md5').update(u).digest('hex').substr(0, 5);
@@ -454,7 +458,5 @@ module.exports = {
     } else {
       return key + '.';
     }
-
-
   }
 };