Added feature: Deleting a template is now possible
dev Now takes care of surveys using the deleted template and sets the default template , also changed some old paths to use the $tpldir global var

git-svn-id: file:///Users/Shitiz/Downloads/lssvn/source/limesurvey_dev@6662 b72ed6b6-b9f8-46b5-92b4-906544132732