Bump to 0.3

git-svn-id: https://plugins.svn.wordpress.org/menu-humility/trunk@815317 b8457f37-d9ea-0310-8a92-e5e31aec5664
0.3 is stable

git-svn-id: https://plugins.svn.wordpress.org/menu-humility/trunk@815319 b8457f37-d9ea-0310-8a92-e5e31aec5664