enable acceleration, stablize the wheel. Friction should be applied to both objects(to do).
change mass. Now can accelerate quickly
change gear listner. now can move forward and backward correctly.
Set starting acceleration back to false

We want accl = false in the beginning. This is modified by VehicleMovementManager#updateAccelerationState, which is in turn called by either OrientationManager#handleOrientation or physbamRenderActivity, in the gas/brake button click listeners.
remove low-pass-filter. direct control of wheel is better.
acceleration set to false
Merge branch 'master' into resources