added Odeoption as an optional argument to propagator function
added Odeoption as an optional argument to propagator function

cgranade/qutip,qutip/qutip,anubhavvardhan/qutip,cgranade/qutip,zasdfgbnm/qutip,anubhavvardhan/qutip,qutip/qutip,zasdfgbnm/qutip