Import/export function added

git-svn-id: https://plugins.svn.wordpress.org/iq-block-country/trunk@855845 b8457f37-d9ea-0310-8a92-e5e31aec5664
Fixed last tested version

git-svn-id: https://plugins.svn.wordpress.org/iq-block-country/trunk@855848 b8457f37-d9ea-0310-8a92-e5e31aec5664