Properly whacks all ships that are docked together when any are whacked, makes everything more consistent by calling ship_apply_whack instead of physics_apply_whack, whacking in general now unrotates its hit pos to get a world pos like physics whack was expecting and adds a few matrix helper functions.
Many physics values are exposed to scripting, including rotational damp. This PR exposes the linear damp to scripting. Note that in the code the linear damp is called `side_slip_time_const`.
Asteroth