added (a lot of) code to ZCpu
Merge branch 'master' of https://github.com/zsteve/zebra-zmachine-interpreter

Conflicts:
	zcpu/zcpu/main.cpp
	zcpu/zcpu/zcpu.cpp
	zcpu/zcpu/zcpu.h
	zcpu/zcpu/zcpu/zcpu.v11.suo
	zcpu/zcpu/zopcode_impl.cpp
	zglobal/zglobal.cpp