Ver 2.5 Fixing subdirectory install isue

git-svn-id: https://plugins.svn.wordpress.org/simple-custom-css/trunk@866235 b8457f37-d9ea-0310-8a92-e5e31aec5664
Minor update to read me

git-svn-id: https://plugins.svn.wordpress.org/simple-custom-css/trunk@866239 b8457f37-d9ea-0310-8a92-e5e31aec5664