Updated readme.txt to reflect testing up to 3.8.3

git-svn-id: https://plugins.svn.wordpress.org/all-settings/trunk@894518 b8457f37-d9ea-0310-8a92-e5e31aec5664
Updated readme.txt files to indicate license

git-svn-id: https://plugins.svn.wordpress.org/all-settings/trunk@894535 b8457f37-d9ea-0310-8a92-e5e31aec5664