[cctbxbb] Backwards compatibility; Python 2.3?

[Nicholas Devenish]

Hi All,

I'm starting to go through and learn some of the structure of these
packages, starting with libtbx.

What's the supported targets supposed to be? There seems to be code
specifically marked as backwards compatibility for Python 2.3 (2003),
and packages explicitly included that were merged into the standard
library around the same time (e.g. Optik).

Is this really as far back as we need to support?

Thanks,

Nick Devenish