sim_core_v3.c is now sim_fast_core.c

	deleted:    simavr/sim/sim_core_v3.c
fast core back to running...  avr_core_run_many seems to be working fine.

makefiles are set for deemed maximum possible optimization based on i686 platform.
for the moment, extra data needed by the core is piggybacked onto existing
flash buffers...  tagging on to struct avr_t still seems to cause memory corruption
issues, being able to eliminate that should be able to make things tick just a wee
bit faster still.

	modified:   Makefile
	modified:   ../../simavr/Makefile
	modified:   ../../simavr/sim/sim_avr.c
	modified:   ../../simavr/sim/sim_avr.h
	modified:   ../../simavr/sim/sim_fast_core.c