Use double precision for Bullet.
Use double precision for Bullet.

Define BT_USE_DOUBLE_PRECISION in collision CMakeLists.txt. We shouldn't need
to do this once we can read it from the pkg-config file properly.

psiorx/drake,edowson/drake,crogers3/drake,edowson/drake,psiorx/drake,tkoolen/drake,astrorog/drake,scottviteri/drake,astrorog/drake,thientu/drake,psiorx/drake,psiorx/drake,scottviteri/drake,edowson/drake,edowson/drake,astrorog/drake,tkoolen/drake,manuelli/drake,manuelli/drake,billhoffman/drake,edowson/drake,billhoffman/drake,scottviteri/drake,psiorx/drake,crogers3/drake,tkoolen/drake,billhoffman/drake,hanssusilo/drake,hanssusilo/drake,tkoolen/drake,scottviteri/drake,manuelli/drake,manuelli/drake,hanssusilo/drake,billhoffman/drake,astrorog/drake,crogers3/drake,crogers3/drake,edowson/drake,hanssusilo/drake,crogers3/drake,thientu/drake,psiorx/drake,billhoffman/drake,crogers3/drake,thientu/drake,sheim/drake,sheim/drake,scottviteri/drake,psiorx/drake,sheim/drake,manuelli/drake,thientu/drake,billhoffman/drake,thientu/drake,hanssusilo/drake,astrorog/drake,scottviteri/drake,hanssusilo/drake,tkoolen/drake,thientu/drake,billhoffman/drake,edowson/drake,crogers3/drake,crogers3/drake,billhoffman/drake,sheim/drake,sheim/drake,psiorx/drake,tkoolen/drake,sheim/drake,sheim/drake,astrorog/drake,manuelli/drake,tkoolen/drake,sheim/drake,edowson/drake,thientu/drake,hanssusilo/drake,manuelli/drake,astrorog/drake,scottviteri/drake,hanssusilo/drake