Check in version 1.7.2

git-svn-id: https://plugins.svn.wordpress.org/wp-backitup/trunk@938501 b8457f37-d9ea-0310-8a92-e5e31aec5664
Release Version 1.7.2

git-svn-id: https://plugins.svn.wordpress.org/wp-backitup/trunk@938508 b8457f37-d9ea-0310-8a92-e5e31aec5664