added 'fast' Qobj creation method which skips all the usual checks for using in ode solvers
added 'fast' Qobj creation method which skips all the usual checks for using in ode solvers

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