search for _vecbodies when releasing grabbed objects that are being r…

…emoved, have better msg when KinBody::Release cannot find part to release

Merge branch 'pybind11_stable' into pybind11_latest

Merge branch 'pybind11_stable' into pybind11_dev

release 0.9.0

OpenRAVE Release 0.8.2

OpenRAVE Release 0.8.0

OpenRAVE Release 0.6.6

OpenRAVE Release 0.6.4

OpenRAVE Release 0.6.2

OpenRAVE Release 0.6.0