moving screenshot to correct folder

git-svn-id: https://plugins.svn.wordpress.org/hits-ie6-pngfix/trunk@1042372 b8457f37-d9ea-0310-8a92-e5e31aec5664
moving screenshot to correct folder

git-svn-id: https://plugins.svn.wordpress.org/hits-ie6-pngfix/trunk@1042373 b8457f37-d9ea-0310-8a92-e5e31aec5664
removing screenshots folder

git-svn-id: https://plugins.svn.wordpress.org/hits-ie6-pngfix/trunk@1042374 b8457f37-d9ea-0310-8a92-e5e31aec5664
version 3.7

git-svn-id: https://plugins.svn.wordpress.org/hits-ie6-pngfix/trunk@1042375 b8457f37-d9ea-0310-8a92-e5e31aec5664
updating readme to reference latest release as stable

git-svn-id: https://plugins.svn.wordpress.org/hits-ie6-pngfix/trunk@1042377 b8457f37-d9ea-0310-8a92-e5e31aec5664