Update readme, add features to version changelog, mark stable at 0.3.

git-svn-id: https://plugins.svn.wordpress.org/wp-seedbank/trunk@842942 b8457f37-d9ea-0310-8a92-e5e31aec5664
Add localization infrastructure for the plugin.

git-svn-id: https://plugins.svn.wordpress.org/wp-seedbank/trunk@842943 b8457f37-d9ea-0310-8a92-e5e31aec5664