Version 3.0.6

git-svn-id: https://plugins.svn.wordpress.org/easyazon/trunk@859815 b8457f37-d9ea-0310-8a92-e5e31aec5664
Porting readme changes from the tag.

git-svn-id: https://plugins.svn.wordpress.org/easyazon/trunk@859821 b8457f37-d9ea-0310-8a92-e5e31aec5664