- Updated readme.

git-svn-id: https://plugins.svn.wordpress.org/wp-statistics/trunk@1028844 b8457f37-d9ea-0310-8a92-e5e31aec5664
- Updates for 8.3.1 release.

git-svn-id: https://plugins.svn.wordpress.org/wp-statistics/trunk@1028849 b8457f37-d9ea-0310-8a92-e5e31aec5664