don't copy __slots__ and properties. also added test

test.py

@@ -18,6 +18,8 @@
 assert mod.Inheritor2().val == 'new'
 assert mod.Inheritor3().val == 'new'
 
+assert mod.Slots().prop.val == 'new'
+
 assert mod.user1() == 'new'
 assert mod.user2() == 'new'
 

test_orig.py

@@ -35,6 +35,11 @@ def __init__(self):
 else:
 	Inheritor3 = Inheritor2
 
+class Slots:
+	__slots__ = ('prop',)
+	def __init__(self):
+		self.prop = Foo()
+
 #methods
 def user1():
 	return Foo().val

zodiac.py

@@ -57,7 +57,8 @@ def rebase_class(cls, target, new_name=None, ns=None):
 	new_cls._my_class = new_cls
 
 	for name, item in cls.__dict__.items():
-		if name in ('__dict__', '__bases__', '__weakref__', '__name__', '__module__', '__doc__'): continue
+		if name in ('__dict__', '__slots__', '__bases__', '__weakref__', '__name__', '__module__', '__doc__'): continue
+		if isinstance(item, types.MemberDescriptorType): continue
 		rebase(item, new_cls, name, ns)
 
 	setattr(target, new_name, new_cls)