* fixed some bugs

git-svn-id: https://plugins.svn.wordpress.org/minecraft-admin/trunk@976350 b8457f37-d9ea-0310-8a92-e5e31aec5664
* added uninstall file

git-svn-id: https://plugins.svn.wordpress.org/minecraft-admin/trunk@976354 b8457f37-d9ea-0310-8a92-e5e31aec5664