Fixed bugs in debug mode.

git-svn-id: https://plugins.svn.wordpress.org/featured-galleries/trunk@897278 b8457f37-d9ea-0310-8a92-e5e31aec5664
Updating readme.

git-svn-id: https://plugins.svn.wordpress.org/featured-galleries/trunk@897279 b8457f37-d9ea-0310-8a92-e5e31aec5664