Added asyncevents call to enable asynchronous event handling

Allow changing labels on yesnocancel dialog

windowing programs, together with option to keep console window closed
until needed.

an AESend with command-. (unless specifically disabled, of course).

handling in inner loop with python code. Also move (previously
machine independent) PyErr_CheckSignals here, so we can propagate
exceptions in event handling code.

an FSSpec to a non-existing file.

since calculate_path() in getpath.c will automatically add this.
Including this here will put the sharedmodules directory on sys.path
twice.

- Remembering whether sys.path components refer to files or folders,
- Using mac-specific code to check for file existence, in stead of trying
  to fopen() each possible file.

These mods need an accompanying mod to import.c.

resources when set)

  open (so the user can quit with cmd-Q, print, etc)
- Removed a few unused routines

image of the argument list....

than just the four.

Also folded some long lines.

so that MSVC 4.2 doesn't complain under NT.

This should solve a weird problem on the Mac for Jack.

Added SchedParams
Added docstrings for most routines