Documents in this module are under different licenses. See the individual
documents for more details, but in general:

* accessibility-devel-guide is under the GFDL 1.1 or later
* hig is licensed under CC-BY-SA-4.0
* optimization-guide is under the GFDL 1.1 or later
* platform-demos is licensed under CC-BY-SA-3.0 with a special code exception
* platform-overview is licensed under CC-BY-SA-3.0
* programming-guidelines is licensed under CC-BY-SA-3.0
