Map ahl_extraneous for HL

*AHL_EXTRANEOUS by SPITE* --spite@cfw.com Alien Slave reskin by Springer Alien Slave VGUI & map tweakage by Jinx --http://www.cryotank.net/maps/ Evil's Texture Pack 4 by evil lair --hfx@planetquake.com --http://www.planethalf-life.com/wadfather --http://www.planetquake.com/hfx/ Environment Map by Mighty Pete --http://www.petes-oasis.com/ --http://www.planethalf-life.com/wadfather Additional Ambient Sounds from MeanRabbit.com --http://www.meanrabbit.com