rename size to figsize to avoid name space collision. minor code cleanup
rename size to figsize to avoid name space collision. minor code cleanup

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