added option new keyword argument to plot_winger and plot_wigner_fock_distribution to choose 3d surface plot instead of contour plot
added option new keyword argument to plot_winger and plot_wigner_fock_distribution to choose 3d surface plot instead of contour plot

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