version 1.5.3

git-svn-id: https://plugins.svn.wordpress.org/mydownload/trunk@919832 b8457f37-d9ea-0310-8a92-e5e31aec5664
adding first version of mydownload plugin

git-svn-id: https://plugins.svn.wordpress.org/mydownload/trunk@919834 b8457f37-d9ea-0310-8a92-e5e31aec5664