Keep a reference to Tuning and Raycaster in vehicles

[gepa21]

... so garbage collector will not collect/dispose them while being used

[AndresTraks]

All vehicle classes have been rewritten as C++/CLI managed classes.

[gepa21]

That's awesome :)

I pulled the changes and did some testing.
Everything seemed to work ok physics-wise but i noticed that the wheels were not turning...
so i did some digging and found that for the calculation it chooses RightAxis instead of ForwardAxis.

I fixed that and everything seems to work great now. The fix is here #5

[gepa21]

i fixed another problem... when i compiled in Release mode (sharpdx) it would crash immediately.
I tracked the problem in the "delete info;" of the _fixedBody's info in RaycastVehicle static constructor.
I updated pull request #5 to include this fix.

[AndresTraks]

Ah, I merged the pull request, but didn't see the second part.
The RigidBodyConstructionInfo should be deleted, because it isn't used any longer. There must be something else wrong there. I'll investigate..
The axis fix is good, thanks!

[gepa21]

actually in my branch i completely removed fixedbody, but RigidBodyConstructionInfo has a destructor so it will be deleted when it's not referenced anymore

[AndresTraks]

That's true, but a preemtive Dispose is always good.