added velocity damping factor to friction force in addition to damping force
recompiled rainflow
Merge branch '11_physics_test_earth_elevation' into dev
removed damping factor and vcut from friction force and added damping to drop reaction instead
Merge branch '11_physics_test_earth_elevation' into dev
reduced vscale to .7 in drop for collision damping
Merge branch '11_physics_test_earth_elevation' into dev