no take/steal/untake functionality
python-rt is missing the take/steal/untake methods.
I have implemented this in https://github.com/wtsi-hgi/python-rt/commit/34ce8a4757c19082c735ccaf83192d221ae5f91a#diff-b1aec1375d2b8fd173fe3dce678253ad - feel free to merge into the main version.