Update v0.58 Steam workshop & mod support

Dark Dealings

The only way to rise to the top in this world is the hard way, so get on your bike and get to work!

In this update we changed the game so it now quits back to the main menu first to allow the player to start a new game without leaving. Added a recovery feature to the vehicles in case the player gets stuck. Added Billboard/Bus stop image Creator that will allow the player to swap out or add to the existing random advertisements that appear round the world. Added Character Audio Creator allowing the player to make there own audio packs for characters. Added a Steam Workshop Uploader for uploading mod packs to share. Removed some audio, tweaked some audio, added some audio. We have also hopefully fixed the camera jitter some users experienced with higher frame rates.