Reorganized core/ directory, it was too fatty already

-Removed FuncRef, since Callable makes it obsolete
-Removed int_types.h as its obsolete in c++11+
-Changed color names code

modules/visual_script/visual_script_builtin_funcs.h

@@ -89,7 +89,6 @@ public:
 		LOGIC_CLAMP,
 		LOGIC_NEAREST_PO2,
 		OBJ_WEAKREF,
-		FUNC_FUNCREF,
 		TYPE_CONVERT,
 		TYPE_OF,
 		TYPE_EXISTS,