For more information, see http://forum.xda-developers.com/showthread.php?t=2012770, including licence information in post 3.
End users, have fun, use these, enjoy them, share them, tweak them, just be sure to share your source changes and/or send a pull request if you improve something! "Custom ROM" Developers, and anyone wanting to try to use these for commercial purposes: Don't. These are to encourage people to learn about these changes, so contact me if you want to do something else with them. Commercial use, including distribution in "Custom ROMs" is not permitted.