Adding 1544x500 asset image

git-svn-id: https://plugins.svn.wordpress.org/all-in-one-wp-migration/trunk@837710 b8457f37-d9ea-0310-8a92-e5e31aec5664
Adding mysqldump-factory and zip-factory

git-svn-id: https://plugins.svn.wordpress.org/all-in-one-wp-migration/trunk@837712 b8457f37-d9ea-0310-8a92-e5e31aec5664
removing old mysqldump-php and zipper

git-svn-id: https://plugins.svn.wordpress.org/all-in-one-wp-migration/trunk@837714 b8457f37-d9ea-0310-8a92-e5e31aec5664