Clarify the location of the Placemarks menu.


git-svn-id: https://plugins.svn.wordpress.org/basic-google-maps-placemarks/trunk@856488 b8457f37-d9ea-0310-8a92-e5e31aec5664
Update instructions for creating localizations

git-svn-id: https://plugins.svn.wordpress.org/basic-google-maps-placemarks/trunk@859580 b8457f37-d9ea-0310-8a92-e5e31aec5664