[Vm-dev] New COg VMs available at...

http://www.mirandabanda.org/files/Cog/VM/VM.r2502/

CogVM binaries as per VMMaker.oscog-eem.134/r2502

Ensure the unix run scripts set SQUEAK_PLUGINS if unset.

Fix remaining bug in context access fixes of VMMaker.oscog-eem.119. stObject:at: and stObject:at:put: need to use stackPointerForMaybeMarriedContext: not fetchStackPointerOf:, since the context's stack pointer may be stale.

Fix send trace printing. Interpreter sends need also to be printed. (A better fix is probably to redo sendBreakpoint: but this will serve for now). N.B. this reassigns the sendtrace flag values.

Add primitiveNotEquivalent with prim # 169.