Automake patches

Here's a series of patches that adds
automake support to the build.  I've
only tested this on Mac OSX, where
make DESTDIR=/foo install produces
an identical install as the original
build, except that no link to screen-4.1.0
is made.  (It just installs
$(prefix)/bin/screen)  There's room for
improvement here, but I think this is a
good start.

I think this list has a 10k file size
limit, so I've prepared the patch sets
to all be smaller than that, but the first
patch set that simply removes src/configure.in,
src/Makefile.in, and src/doc/Makefile.in is
too large, so I'm not including it.  It can
easily be generated with:

git rm src/configure.in src/Makefile.in src/doc/Makefile.in

There are 10 patches, to come in subsequent posts.
Patch 1 (not included as mentioned above) was prepared
against commit 18796d59.

-- 
William Pursell