change file names to lower case

git-svn-id: https://plugins.svn.wordpress.org/dpabottomofpostpage/trunk@988090 b8457f37-d9ea-0310-8a92-e5e31aec5664
trying to lower case

git-svn-id: https://plugins.svn.wordpress.org/dpabottomofpostpage/trunk@988092 b8457f37-d9ea-0310-8a92-e5e31aec5664