* logic improvement

git-svn-id: https://plugins.svn.wordpress.org/sns-count-cache/trunk@961083 b8457f37-d9ea-0310-8a92-e5e31aec5664
* add uninstall.php

git-svn-id: https://plugins.svn.wordpress.org/sns-count-cache/trunk@961084 b8457f37-d9ea-0310-8a92-e5e31aec5664