added optional arguments in parfor that can be passed to the user-defined function. for increased interoperability/swappability with ipynbtools.parfor
added optional arguments in parfor that can be passed to the user-defined function. for increased interoperability/swappability with ipynbtools.parfor

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