- fix tab space issues (SF patch #101167 by Neil Schemenauer)
- fix co_flags for classes to include CO_NEWLOCALS (SF patch #101145 by Neil)
- fix for merger of UNPACK_LIST and UNPACK_TUPLE into UNPACK_SEQUENCE,
  (SF patch #101168 by, well, Neil :)
- Adjust bytecode MAGIC to current bytecode.

TODO: teach compile.py about list comprehensions.