New version of assume feature, some relocatable features

	I have a new version of the "assume" featuere.  It's still
limited to assembly time testing, but now does something in
relocatable mode: Symbols whose absolute values are known at assebly
time get bank checking.

	This may not sound like much, but remember that at least the
spfreg definitions are absolute.

	http://www.mv.com/ipusers/ke1g/assume2.tgz is the relevant
tar ball.  (The old version is also still available, leave out the
"2".)

							Bill