Add some ... subtle notes
Catch ProcsesFailed errors
Catch editor failures
- Try to set a sane default path if you specify --prefix for python
  packages.
  If you say --prefix /foo/bar, then setup.py is invoked with:
    .py --install-data /foo/bar/data
    .py --install-scripts /foo/bar/bin
    .py --install-lib /foo/bar/lib