Updated Cover images, Plugin Settings , Readme file.
Fixed Plugin's Activation/Deactivation functionality.

git-svn-id: https://plugins.svn.wordpress.org/playbuzz/trunk@846788 b8457f37-d9ea-0310-8a92-e5e31aec5664
Added 2 more screenshots

git-svn-id: https://plugins.svn.wordpress.org/playbuzz/trunk@846789 b8457f37-d9ea-0310-8a92-e5e31aec5664