Update 27

 - Fixed the issue of weapons performing a secondary fire, if switching too quickly from secondary to primary. (Might still be an issue with the grenade launcher and cannon.)

 - Zorg snipers, instead of shooting homing projectiles, shoot very fast projectiles with predicted aim. They also do a green laser effect before they shoot.

 - Sniper graphics now change colours to indicate enemy health

 - The XM8 has been given a new zooming graphic, enemy health indication included

 - Added sounds for the hammer and chainsaw hitting things

 - Added a new variety of Walker, as requested by CaptainPelmen

What to replace: EntitiesMP.dll, GameMP.dll, TexturesF (/interface), ModelsMP (enemies/walker), DataF (messages/enemies), SoundsF (weapons)