note: no need to care for __builtin__.super support here, that super wont work
with Cocoa classes anyway (already true in 2.x, and more glaringly so in 3.0)
-* Attribute lookup converts name to bytestring and that to a SEL. For python 3.3 we can
- shortcut this: selectors must be all ascii, hence we could just check that the unicode
- object has the ascii representation and then directly access the UCS1 buffer instead
- of converting to a bytes object first. This should slightly improve performance.