Thanks!
That helps, but doesn't answer the question. This part is very helpful:
> Files we created are licensed under the Apache License, Version 2.0, viewable at http://www.apache.org/licenses/LICENSE-2.0, and are marked as such.
This part makes it useless:
> Code borrowed from other sources keeps the original copyright and license.
What are those licenses? If they used a package manager I could just see that (a nice easy list). As it is, I can't tell what rights and requirements I have.