Upgrade features

git-svn-id: https://plugins.svn.wordpress.org/photos-box/trunk@1028382 b8457f37-d9ea-0310-8a92-e5e31aec5664
Update screen shot

git-svn-id: https://plugins.svn.wordpress.org/photos-box/trunk@1028385 b8457f37-d9ea-0310-8a92-e5e31aec5664
readme.txt

git-svn-id: https://plugins.svn.wordpress.org/photos-box/trunk@1028388 b8457f37-d9ea-0310-8a92-e5e31aec5664
readme - install

git-svn-id: https://plugins.svn.wordpress.org/photos-box/trunk@1028390 b8457f37-d9ea-0310-8a92-e5e31aec5664