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.

fileargument moved here from macmain.c

- Moved fileargument to config.c
- Added PyMac_AddLibResources() call in case of shlib python
- Build argc/argv differently in case of applet template

from an alias resource (or from the user). Note: this uses a dialog
resource so there's an accompanying change in the resource file.

some Tk 4.0 specific changes