Also cleaned out some CR's left by the VC++ editor.

under WIN32 -- remove file handler interface, don't use Py_input_hook.

while one thread is blocked in mainloop().  Also, handle signals (not
just interrupts) as soon as they happen.

Cleanup: remove support for Tcl/Tk versions 7.4/4.0.  (I've confirmed
that it works for 7.5/4.1 and 7.6/4.2, as well as 8.0b2.)

Coding style change: instead of ``func (args)'', write ``func(args)''
everywhere.

Minor functionality change: use PyArg_ParseTuple everywhere.  This
should only affect the errors reported for bad argument lists; in
particular, deletefilehandler() is much clearer about what's going
on.

(XXX Still to do: Mac and Win ports to 8.0b2.)

Jack's code).

Two new modules fpectl and fpetest.
Surround various and sundry f.p. operations with PyFPE_*_PROTECT macros.

memory leak in Tkapp_(Create|Delete)FileHandler plugged.

standard eyeballing

This is needed because if a configure option has " as its value,
it will be rendered as {"}; after stripping one level of quoting it's
just ", on which splitlist will barf.

- Use ckalloc(), ckfree() everywhere.
- Default FREECAST to (char *).
- Added comment with Tcl/Tk version info.

Set Tk variable argv0 to classname passed in to Tkapp_New.  (Fred)

Updated some comments.
Fixed bug in Merge() called with NULL args.
Get rid of TkDefaultAppName() -- it is not used anywhere.
Pass error message on when Appinit fails.
Create/Delete FileHandler assume fd is a socket on Windows.

some Tk 4.0 specific changes