Readme 3.0.2.1 Readme update with Widgets Section

git-svn-id: https://plugins.svn.wordpress.org/muut/trunk@964708 b8457f37-d9ea-0310-8a92-e5e31aec5664
Readme 3.0.2.1 screenshots-subscription-specify

git-svn-id: https://plugins.svn.wordpress.org/muut/trunk@964714 b8457f37-d9ea-0310-8a92-e5e31aec5664