[ODE] Cylinder support

[Adam D. Moss]

Jason Perkins wrote:
> Just to clarify, I was suggesting the the flag to completely disable
> trimeshes be removed. Flags would still be provided to switch between
> opcode, bullet, and any other collision systems that were added, but
> trimesh support would always be available.
> 
> There appear to be objections though, so let's just leave it as it is.

I'd like to chime-in late and object too -- I usually simply *don't
need* trimesh support, so it adds a disproportionately weighty amount
of binary footprint to ODE for what is dead code to me.

Cheers,
--Adam