version 3.0.7

git-svn-id: https://plugins.svn.wordpress.org/sweetcaptcha-revolutionary-free-captcha-service/trunk@857109 b8457f37-d9ea-0310-8a92-e5e31aec5664
stable version degrade

git-svn-id: https://plugins.svn.wordpress.org/sweetcaptcha-revolutionary-free-captcha-service/trunk@857532 b8457f37-d9ea-0310-8a92-e5e31aec5664
rollback to 3.0.6

git-svn-id: https://plugins.svn.wordpress.org/sweetcaptcha-revolutionary-free-captcha-service/trunk@857533 b8457f37-d9ea-0310-8a92-e5e31aec5664
updated readme

git-svn-id: https://plugins.svn.wordpress.org/sweetcaptcha-revolutionary-free-captcha-service/trunk@858800 b8457f37-d9ea-0310-8a92-e5e31aec5664