change installation

git-svn-id: https://plugins.svn.wordpress.org/mapsian/branches/1.3.1@936894 b8457f37-d9ea-0310-8a92-e5e31aec5664
change installation

git-svn-id: https://plugins.svn.wordpress.org/mapsian/branches/1.3.1@936895 b8457f37-d9ea-0310-8a92-e5e31aec5664