Added MIT license, which I believe is closest to what you are looking fo...

The MIT license is I believe the closest to what you are looking for. http://opensource.org/licenses/MIT

In short, it says:
(1) You have to credit me
(2) If it breaks it's not my fault

The advantage here is that it's a known license with known legal text that an actual lawyer would be able to take at face value and not laugh it off.