Review response.

Changes include:
- Fix outdated code in bin/genInputRegistry.py (no ccd key; also modified to use argparse).
- Updated the registry database file. It was missing some entries and the format changed
  when I updated bin/genImputRegistry.py.
- Made all tests/utils use argparse and removed file doc strings (use argparse help instead).
- Simplified testMapper.paf as per K-T's suggestions (except that removing table entries
  made tests fail, so I did not do that).
- Removed convertDefecs.py because it was too fragile. I you used the wrong
  version of obs_lsstSim to get your defects the resulting defects were unusable;
  using defectsFromBias.py is much safer.
- Updated tests/map.py for the above changes and made testQueryMetadata more thorough.