code improvements

git-svn-id: https://plugins.svn.wordpress.org/flash-album-gallery/trunk@849520 b8457f37-d9ea-0310-8a92-e5e31aec5664
readme change

git-svn-id: https://plugins.svn.wordpress.org/flash-album-gallery/trunk@849521 b8457f37-d9ea-0310-8a92-e5e31aec5664