Tested and stable with WP4.0

git-svn-id: https://plugins.svn.wordpress.org/humancaptcha/trunk@975064 b8457f37-d9ea-0310-8a92-e5e31aec5664
Moved the icons to the correct directory

git-svn-id: https://plugins.svn.wordpress.org/humancaptcha/trunk@975068 b8457f37-d9ea-0310-8a92-e5e31aec5664