solved an issue with stylesheet links appended by a URL-query like ?v=100

detailed explanation in PW-forum: http://processwire.com/talk/topic/4562-module-spex-an-asset-and-template-management-module/#entry46402
Merge pull request #4 from horst-n/patch-1

solved an issue with stylesheet links appended by a URL-query like ?v=10...