tagging version 1.0 (hurray)

git-svn-id: https://plugins.svn.wordpress.org/mk-simple-backups/trunk@981822 b8457f37-d9ea-0310-8a92-e5e31aec5664
updating readme and screenshot

git-svn-id: https://plugins.svn.wordpress.org/mk-simple-backups/trunk@981831 b8457f37-d9ea-0310-8a92-e5e31aec5664