Beta Javielucho Mad Mod 0.3.15

A little update to fix a couple of bugs (I also added a new config):

· Fixed the Mad Rig wheels of the truck and the tanker trailer. My custom hubcap was the problem. Now it is a flexbody with the same wheel group. I tested it crashing the truck and using the nodegrab and it seems that the problem is solved.

· Fixed the sniper truck missile.

· Added moonhawk config: "Shelter".