Message 64359 - Python tracker

This new patch includes surgery to the compiler package (especially
flowgraph trickery) in order to make it work with the new opcodes. I
think my changes are sane but since the package seems basically
untested, unmaintained and almost unused, there may be some glitches.
However, test_compiler passes.

(test_dis will need to be updated for the new opcodes, not a big deal)