[ogf-d20-l] Updates to STL

[Ryan S. Dancey]

The legal team has finished reviewing the STL itself, and I have posted
their current draft to www.opengamingfoundation.org/d20.html for review.

There are number of very minor language changes and one substantive change.
In the section of the license dealing with a change to the license term
itself, permission is now granted to continue to distribute pre-existing
materials for 90 days after the change of the license, with further
distribution allowable by requesting permission from Wizards.

Ryan