[[ RefactorSyntax ]] Updated MCLog to use MCStringFormat and so now supports %@.
Corrected submodules.
[[ Unicodify ]] Unicodified MCStack::getstackfiles().
Merge remote-tracking branch 'upstream/refactor-syntax_unicode' into refactor-syntax_unicode_MCStringGetCString

Conflicts:
	engine/src/exec-interface-stack.cpp
	engine/src/stack.h
	engine/src/stack2.cpp
	engine/src/stack3.cpp