Added missing angle for trailer

Added: Missing Angle for Tailers. Angle depands on speed and wheels yaw
Added missing angle for trailer
Some minor fixes. This update is horrific :(
Merge pull request #176 from Minecraft-SMP/RotateGunner

Added: Rotate Gunner with turret
Merge pull request #175 from Minecraft-SMP/TrailerAngle

Added missing trailer angle
Merge remote-tracking branch 'origin/master' into Development