Amendment Bylaw

This clarifies a general unwritten rule, with some obvious exceptions, looking forward to a day when
we have to deprecate and replace PSRs. Typos are already being merged as are formatting issues, so none of this should be considered new or scary.

The only major difference is "reference areas", which make ONE AND ONLY ONE part of PSRs variable, and that is PURELY to allow PSRs to be pushed onto the stack of dependencies IF THEY ARE DEEMED COMPATIBLE. Incompatible PSRs are obviously not going to be listed in a list of compatible PSRs.