Mostly Combine Army changes

[eno26]

• Hopefully fixed the Hunter model crashing clients
• Did a temporary lazy fix to make Hunters more threatening
• Fixed being able to be just out of a Hunter's melee reach to make it attack and not hit you
• Hunters now stand still when attacking
• Generally just buffed Hunters
• Increased Merlton's buff duration 6.0 seconds --> 8.0 seconds
• Buffed Merlton's damage
• Increased Omega's speed (250 --> 300) This was done in preperation for the new map (and also because his previous speed was barely faster than backwalking which is dumb)
• Changed some waves on normal and fast Combine Army, bosses do not spawn first anymore, and some boss rush waves were buffed
• Added new icons for C.A.T. and C.H.I.M.E.R.A. (made by @lite_flame)!
• Fixed Corrupted Barney's improper music looping