Make license and copyright status more obvious in readme.

Author: sarciszewski

README.md

@@ -2,6 +2,8 @@
 
 This library backports some new features into old versions of PHP.
 
+This **MIT Licensed** project is produced and maintained by [Resonant Core](https://resonantcore.net) for the good of the PHP developer community.
+
 ## ATTENTION PHP 5.2 / 5.3 USERS
 
 We don't support versions of PHP that have reached or exceeded their end-of-life date.