Map cs_altosierra for cs 1.6

AltoSierra formerly HighSierra Mapping by: [fCo]CaptSensible (captsensible@fightcompany.com) (I rarely check my E-mail:P) Stock Valve and CS textures Counter-Terrorists: Navigate your way up the mountain and rescue the Hostages. Watch out for Terrorists. Terrorists: Prevent the Counter-Terrorists from rescuing the Hostages, or eliminate the Counter-Terrorists. Special thanks to clans [fCo], [PCE], and [SDSP] for playtesting (Press FIRE to continue)