Adds "tutorial1" teleporter to Nexus map just as "newbiehouse" is set up.

See patch https://sourceforge.net/p/crossfire/patches/419/

start/Nexus

@@ -11,7 +11,7 @@ enter_x 12
 enter_y 12
 msg
 Created:  2003-09-25 Avion
-Modified: 2021-07-27 rock808
+Modified: 2021-09-01 rock808
 endmsg
 end
 arch blocked
@@ -2212,6 +2212,16 @@ y 16
 no_magic 1
 damned 1
 end
+arch exit
+name teleporter
+slaying /start/tutorial1
+face teleporter.111
+hp 11
+sp 1
+x 12
+y 16
+unique 1
+end
 arch tile_white_floor
 x 12
 y 17