remove v2.4.3 files

git-svn-id: https://plugins.svn.wordpress.org/cf-whiteboard/trunk@1046493 b8457f37-d9ea-0310-8a92-e5e31aec5664
add v2.4.4 files

git-svn-id: https://plugins.svn.wordpress.org/cf-whiteboard/trunk@1046494 b8457f37-d9ea-0310-8a92-e5e31aec5664
v2.4.4 readme

git-svn-id: https://plugins.svn.wordpress.org/cf-whiteboard/trunk@1046495 b8457f37-d9ea-0310-8a92-e5e31aec5664