Remove some of GCC's warning in -Wstrict-prototypes mode.

This closes SourceForge patch #101342.

expression next to a || expression; this is a readability-inspired
warning from GCC.

in Parser/grammar.c.

close SF patch #101354

according to the MS docs it enables exception-handling, and (according
to Alex Martelli <aleaxit@yahoo.com>) is needed to compile without
getting warnings from standard C++ library headers.  Apparently
it doesn't cause any problems with C code, so I haven't bothered
conditionalizing the use of /GX.

scripts as much as possible.

longer meaningful to a new user, since stdwin is long gone.

* deletes cache
* adds firstweekday and setfirstweekday functions that allow user to control
  which day of the week is first when displaying calendars
* adds month, week, calendar functions that return their results instead of
  printing them
* adds symbolic constants MONDAY, ..., SUNDAY so users need not remember the
  ordinal values of the weekdays

but many conventions were broken.

class-based APIs.

file is not used in the online documentation.

Martin von Loewis, Peter Funk, James Henstridge, Francois Pinard, and
Marc-Andre Lemburg.

    description of listcomps and used as inspiration)
Rearranged sections (which accounts for much of the size of the diffs)
Added section on augmented assignment
Mentioned 'print >>file'
Broke up the "Core Changes" section into subsections

the patch or forgot about it -- this is easier than reminding him).

HTML generation; the machinery was there but no option to set it was
defined.

Simplify some of the path-math since we can assume a recent version of
Python.

In test_poll1(), unregister file descriptors as they're closed,
    and also close the read end of the pipe
In test_poll2(), make the code assume less about the combinations of flag
    bits that will be returned

Makefile.deps.

figures out old (a.out) and newer (ELF) systems, similar to NetBSD.

(I'm assuming this is also by tg@FreeBSD.org.)

Our (FreeBSD's) security officer doesn't like
group-writable directories and sent a patch;
don't install *.orig.

-- tg@FreeBSD.org

This helps on 4.4BSD-based systems.