alias resource. Also added a few comments.

into fsspec and alias objects.

- Assume files of types 'PYC ' and 'APPL' are compiled python code
- For mwerks, show status line when program has terminated while
  keeping window open.

library. Modified because the startup code has to work together with
the runtime support in the shared library.

where we're loaded from and PyMac_AddLibResources() which adds that
file to the resource file list.