Licence to use

You are free:
•to copy, distribute, display, and perform the work
•to make derivative works
•to make commercial use of the work

Under the following conditions:
•Attribution. You must attribute the work in the manner specified by the author or licensor.
•Share Alike. If you alter, transform, or build upon this work, you may distribute the resulting work only under a license identical to this one.

For any reuse or distribution, you must make clear to others the license terms of this work.
Any of these conditions can be waived if you get permission from the copyright holder.
Your fair use and other rights are in no way affected by the above.

This is a human-readable summary of the Legal Code (the full license).