Added diesel smoke effect to exhaust.

- Changed reverse beep sound so that its more comfortable for the ears and less loud.
- Fixed occasional graphical glitch appearing on right door due to clipping brick.

- Tail lights have been rebuild to give them a cleaner look.
- The wheels are now detailed instead of the bare defaults.
- Licence plate has been updated so it's not the same as the freezer box truck.

Reverse beep system fixed as it broke after an update.
- Reworked reverse beep system
- Adjusted reverse beep sound

The insides of the mirror were incorrectly black. Now the insides are chrome.