[[ RefactorIt ]] Removed direct references to 'it' from syntax classes and moved to being referenced via ep.
[[ RefactorIt ]] Added note about 'local' command not checking for 'it' presence (for backwards compatibility).
Merge branch 'refactor-it' into refactor-syntax_unicode

Conflicts:
	engine/src/ask.cpp
	engine/src/cmds.cpp
	engine/src/cmdsc.cpp
	engine/src/cmdsf.cpp
	engine/src/execpt.cpp
	engine/src/internal_development.cpp
	engine/src/mode_installer.cpp
	engine/src/srvscript.cpp
	engine/src/srvscript.h
	engine/src/statemnt.cpp