[PFS] Pathfinder Society Primer

This has been submitted. Not sure if this is to truly be considered a new source, since all it does is enable the selection and set up the framework for tracking the changes that will eventually need to be applied due to the Paizo Additional Resources Guide. There are no changes at this time. If in the future ioun stones resonant powers are automated, then this will need to be updated as a DATA fix.

I think I shouldn't have entered this as a newsource, since it is just enabling an existing source to be used with PFS with modification.

However, the resolution of this also deletes the relevant files from the pcgen-newsource repo, which is why I called it a newsource.