Added dot-only option

git-svn-id: https://plugins.svn.wordpress.org/great-circle-mapper/trunk@948272 b8457f37-d9ea-0310-8a92-e5e31aec5664
added dot-only option

git-svn-id: https://plugins.svn.wordpress.org/great-circle-mapper/trunk@948274 b8457f37-d9ea-0310-8a92-e5e31aec5664