PHYSICS: More tire lateral symmetry fixes. Remove include reference from tire config and load tire explicitly instead. Add Pacjeka96 tire model as build option, considered experimental atm. Define VDRIFTN to enable new tire model.
PHYSICS: Clarify tire force beckman combining and disable tire camber parameters for now (beckman doesn't handle them correctly).
Update SConscript source files list.
PHYSICS: Fix camber force with beckman combining.