Fixed checking if Vehicle:VC_GetHealth() is available.

• Added madvehicle_targetvehicle (default: 0)
  If it's set to 1, a vehicle with a driver can also be a target of Mad Vehicle.
  
• Added health amount check for VCMod.
  I don't have VCMod. So I'm not sure if it works fine.

Fixed a bug: Jalopy doesn't move.

NPCs who cannot be targeted by Mad Vehicles won't hate them.

Vehicle AI was broken(I failed update again :/).

The previous update is failed, again! sorry!

Fixed spamming error when applying SCAR Abrams.
Added ConVars:

• madvehicle_targetantlion(1) If set 0, Mad Vehicles won't target Antlion group.
  This also determines if they target Xen monsters in Half-Life.
  
• madvehicle_targetcitizen(1) Same as above, but deal with citizens.
  
• madvehicle_targetcombine(1) Combine forces(Soldiers, rollermines, hunters, turrets, etc).
  
• madvehicle_targetmetropolice(1) Metropolices and manhacks.
  
• madvehicle_targetzombie(1) Zombies.
  
• madvehicle_targetmilitary(1) Human grunts, Assassins, Black Ops, etc.
  
• madvehicle_targetother(1) Other NPCs, such as barnacles, ...
  
• madvehicle_targetplayer(1) Players.
  
• madvehicle_targetnextbot(1) Nextbots.

Fixed a bug destroying Mad Simfphys Vehicle won't stop the music.

Fixed an error that more than one Mad Vehicle are enabled in a single vehicle may cause to spam error messages.

Simfphys compatible.
Added ConVars:
- madvehicle_enemyrange(4500) Mad Vehicle targets an enemy within this range.
- madvehicle_detectionrange(30) A vehicle within this distance will become mad.