Finish off Acceptable Licensing header

* OSI Code licensing
* Default MIT licensing in the presence of CC
* No derivatives aren't allowed
* Unlicensing isn't allowed

Closes #56 and Closes #116
> This bullet doesn't actually assign a default license for libraries.

The code does this. ;)

> It should probably move to the Acceptable Licensing section

Isolated legal redundancy here... so it should stay as it's own header.

> to say what the default library license is

That can be achieved with a simple removal of "Users" in the prior `li` and doable... perhaps a change to "all". This area is vague in the CODE because we don't read the metadata which in turn makes it TOS applicable.

Thanks for the feedback.