Added FAQ

git-svn-id: https://plugins.svn.wordpress.org/backup-wp/trunk@1029411 b8457f37-d9ea-0310-8a92-e5e31aec5664
Edited FAQ

git-svn-id: https://plugins.svn.wordpress.org/backup-wp/trunk@1029413 b8457f37-d9ea-0310-8a92-e5e31aec5664