Add a new directory for Luckett and Pike's "Adventure II" (440 points).

This new directory, LUPI0440/, contains Mike Arnautov and Jack Pike's
reconstruction of "Adventure II", exactly as downloaded and un-tarred
from either of these locations:
http://www.mipmip.org/adv440/advIIs.tgz
http://www.ifarchive.org/if-archive/games/source/adv440.tgz

The lineage of this version is:
  WOOD0350 begat LUPI0440, a.k.a. "Adventure II" (Peter Luckett
    and Jack Pike, from 1978 to 1981).
  LUPI0440 was believed lost, but then was reconstructed by
    Mike Arnautov (with Pike's help), circa 2001. The reconstruction
    was done in portable Fortran 77.
  This reconstructed version is called ARNA0440 in Russel Dalenberg's
    taxonomy, and in fact that's what we have here, not the *original*
    Luckett & Pike code (Dalenberg's LUPI0440, which is still lost or
    offline).

A very detailed first-hand account of ARNA0440's history is available
on Mike Arnautov's site:
http://www.mipmip.org/adv440/history.shtml

The new code builds out of the box on Linux as long as you use f77,
but it is insidiously miscompiled by gfortran due to a lack of proper
EXTERNAL directives. (One symptom is that dwarf knives are especially
deadly. Ironically, the other symptom is that if you attempt to enter
an area forbidden to dwarves, the game will crash. This includes most
of Luckett and Pike's new rooms.)
Add an "Adventure II" Makefile; allow compiling with gfortran.

As I'm using OSX as my primary development environment these days, and
fort77/f77 don't seem to have made it to Homebrew yet, it's suddenly
useful to me to be able to compile these Fortran programs with GNU
gfortran. I've edited all three "original Fortran" Makefiles to run
"which f77; which gfortran" and pick the most f77-like option (or fail
if you have no Fortran compiler on your system).

On Ubuntu Linux, you'll want to run
    sudo apt-get install fort77
On OSX, the appropriate command is
    brew install gfortran

Unfortunately, GNU gfortran isn't as faithful to these old dialects as
the f77 compiler was...

  - In LUPI0440/, I needed to add "EXTERNAL RAN" in two places to prevent
gfortran from mistakenly using its built-in RAN function instead of the
one defined in the program itself.

  - In PLAT0550/, I needed to replace the syntax "INTEGER x*4" with
"INTEGER*4 x", since gfortran doesn't accept the former syntax at all.

However, these changes are small enough, and provide enough of a benefit
(Adventure II is now playable on OSX!) that I'm sure they're worthwhile.