New Mac OS Changes

[Andrew Choi]

Hi everyone, I am new here.  If I mess anything up please forgive me.
Let me know and I will try to fix it.

I have added a number of files and changes that will let Emacs compile
on the Mac OS.  Part of the code comes from my port of version 20.
The rest, mostly the display code, is new and borrows much from its
w32 and X counterparts.

Hopefully, these changes will cause very little disruption to your
work because only minor changes are made to existing files.  Most of
the changes in C source files are set off by #if's on the preprocessor
symbol "macintosh".  I have also changed a few Lisp files to recognize
a window system type of "mac".  I have verified that the changes seem
to have no adverse effects on at least the i386-debian-linux-gnu
build.

The most noticeable change is the addition of a directory "mac" at the
top level, which contains all the Mac-specific files, and the addition
of mac-win.el to lisp/term.

For what the Mac code can and cannot do, see mac/README.  Installation
instructions are in mac/INSTALL.

I have started to work on a manual section for Mac but it has not been
integrated into the rest of the manual yet.  The draft can be obtained
at

  ftp://mac-emacs.sourceforge.net/pub/mac-emacs/21/macos.texi

Please also don't get mad at me for adding this so close to pretest.
I was only able to obtain and work on the code quite recently.

Andrew.