Use lua for special level files

Game is playable, and should compile on linux and Windows.
Assumes you have a lua 5.3 library available.

Removes level compiler and associated files.
Replaces special level des-files with lua scripts.
Exposes some NetHack internals to lua:
 - des-table with commands to create special levels
 - nh-table with NetHack core commands
 - nhc-table with some constants
 - u-table with some player-specific data (u-struct)
 - selection userdata

Adds some rudimentary tests.

Adds new extended command #wizloadlua to run a specific script,
and #wizloaddes to run a specific level-creation script.

nhlib.lua is loaded for every lua script.

Download and untar lua:
  mkdir lib
  cd lib
  curl -R -O http://www.lua.org/ftp/lua-5.3.5.tar.gz
  tar zxf lua-5.3.5.tar.gz

Then make nethack normally.

dat/Pri-strt.lua

@@ -0,0 +1,105 @@
+-- NetHack 3.6	Priest.des	$NHDT-Date: 1432512784 2015/05/25 00:13:04 $  $NHDT-Branch: master $:$NHDT-Revision: 1.11 $
+--	Copyright (c) 1989 by Jean-Christophe Collet
+--	Copyright (c) 1991-2 by M. Stephenson
+-- NetHack may be freely redistributed.  See license for details.
+--
+--
+--	The "start" level for the quest.
+--
+--	Here you meet your (besieged) class leader, High Priest
+--	and receive your quest assignment.
+--
+des.level_init({ style = "solidfill", fg = " " });
+
+des.level_flags("mazelevel", "noteleport", "hardfloor")
+
+des.map([[
+............................................................................
+............................................................................
+............................................................................
+....................------------------------------------....................
+....................|................|.....|.....|.....|....................
+....................|..------------..|--+-----+-----+--|....................
+....................|..|..........|..|.................|....................
+....................|..|..........|..|+---+---+-----+--|....................
+..................---..|..........|......|...|...|.....|....................
+..................+....|..........+......|...|...|.....|....................
+..................+....|..........+......|...|...|.....|....................
+..................---..|..........|......|...|...|.....|....................
+....................|..|..........|..|+-----+---+---+--|....................
+....................|..|..........|..|.................|....................
+....................|..------------..|--+-----+-----+--|....................
+....................|................|.....|.....|.....|....................
+....................------------------------------------....................
+............................................................................
+............................................................................
+............................................................................
+]]);
+-- Dungeon Description
+des.region(selection.area(00,00,75,19), "lit")
+des.region({ region={24,06, 33,13}, lit=1, type="temple" })
+
+des.replace_terrain({ region={00,00, 10,19}, fromterrain=".", toterrain="T", chance=10 })
+des.replace_terrain({ region={65,00, 75,19}, fromterrain=".", toterrain="T", chance=10 })
+des.terrain({05,04}, ".")
+
+-- Portal arrival point
+des.levregion({ region = {05,04,05,04}, type="branch" })
+-- Stairs
+des.stair("down", 52,09)
+-- Doors
+des.door("locked",18,09)
+des.door("locked",18,10)
+des.door("closed",34,09)
+des.door("closed",34,10)
+des.door("closed",40,05)
+des.door("closed",46,05)
+des.door("closed",52,05)
+des.door("locked",38,07)
+des.door("closed",42,07)
+des.door("closed",46,07)
+des.door("closed",52,07)
+des.door("locked",38,12)
+des.door("closed",44,12)
+des.door("closed",48,12)
+des.door("closed",52,12)
+des.door("closed",40,14)
+des.door("closed",46,14)
+des.door("closed",52,14)
+-- Unattended Altar - unaligned due to conflict - player must align it.
+des.altar({ x=28, y=09, align="noalign", type="altar" })
+-- High Priest
+des.monster("Arch Priest", 28, 10)
+-- The treasure of High Priest
+des.object("chest", 27, 10)
+-- knight guards for the audience chamber
+des.monster("acolyte", 32, 07)
+des.monster("acolyte", 32, 08)
+des.monster("acolyte", 32, 11)
+des.monster("acolyte", 32, 12)
+des.monster("acolyte", 33, 07)
+des.monster("acolyte", 33, 08)
+des.monster("acolyte", 33, 11)
+des.monster("acolyte", 33, 12)
+-- Non diggable walls
+des.non_diggable(selection.area(18,03,55,16))
+-- Random traps
+des.trap("dart",20,09)
+des.trap("dart",20,10)
+des.trap()
+des.trap()
+des.trap()
+des.trap()
+-- Monsters on siege duty.
+des.monster("human zombie", 37, 01)
+des.monster("human zombie", 37, 18)
+des.monster("human zombie", 03, 03)
+des.monster("human zombie", 65, 04)
+des.monster("human zombie", 12, 11)
+des.monster("human zombie", 60, 12)
+des.monster("human zombie", 14, 08)
+des.monster("human zombie", 55, 00)
+des.monster("human zombie", 18, 18)
+des.monster("human zombie", 59, 10)
+des.monster("human zombie", 13, 09)
+des.monster("human zombie", 01, 17)