initial commit for change_link and multiplexer in master side
initial change for change_link funciton in VM side
Correct Multiplexer definition
support sending change_link command without propagating tokens
Merge branch 'develop' into change_link

Conflicts:
	src/config/wunode/enabled_wuclasses.xml
	wukong/ComponentDefinitions/WuKongStandardLibrary.xml
Make the order for multiplexer right
remove propagation of tokens, otherwise program will freeze. bug fixes