Stalker: anomaly - New exoskeleton suit sounds.

Work continues on the mutants, but mutants are a real challenge audio wise to do, more so then any other sound even anomalies, so far the Burer, Controller, Poltergeist and the Bloodsucker are done so now that I am taking a break from mutants I decided to add a system in for footsteps of the exoskeleton suits found in game, the suits have sounds depending on the type of exo worn, Light, medium, heavy and Nosorog. They all have their own walking, jumping and landing sounds, I tried to not make it too over bearing as the traditional footsteps still play under these but are reduced to emphasis the suit worn.