Small tweaks

Major tweaks + small fixes

• Increased MP5, Taurus, AP9 firerate.
  
• Decreased Sniper firerate when scoped.
  
• Decreased MP5 recoil.
  
• Taurus now has a correct clip size of 10 bullet.
  
• Chaingun fires 4 pellets and consumes 2 ammo every shot.
  
• Decreased crossbow bolt gravity.
  
• Moved weapons in their respective slots (1-6).
  
• Possibly fixed invisible tripmine model hands.

Thanks @hmsthunderchild for hints and help making
the necessary changes.

Source code updated.

Fixed typos in weapon_th_base that caused lua errors.

Thanks to user @HMS Thunder Child for reporting this mistake.

Minor fixes

- Removed forgotten calls to debugoverlay.

- Source code updated.

None Provided