Significant revamp of Port code.
Some cleanup of SimObject code too, particularly to
make the SimObject and MetaSimObject implementations of
__setattr__ more consistent.
Unproxy code split out of print_ini().
src/python/m5/multidict.py:
Make get() return None by default, to match semantics
of built-in dictionary objects.
--HG--
extra : convert_revision : db73b6cdd004a82a08b2402afd1e16544cb902a4
Some tweaking to deal with mutually recursive imports.
--HG--
rename : src/python/m5/config.py => src/python/m5/SimObject.py
extra : convert_revision : 166f7bfabfd20100e93d26a89382469465859988
