add "save" argument
add "save" argument

use it determine whether to save figures rather than None-ness of dirname

fivejjs/crosscat,fivejjs/crosscat,probcomp/crosscat,mit-probabilistic-computing-project/crosscat,fivejjs/crosscat,probcomp/crosscat,mit-probabilistic-computing-project/crosscat,mit-probabilistic-computing-project/crosscat,probcomp/crosscat,fivejjs/crosscat,probcomp/crosscat,probcomp/crosscat,probcomp/crosscat,probcomp/crosscat,fivejjs/crosscat,mit-probabilistic-computing-project/crosscat,probcomp/crosscat,mit-probabilistic-computing-project/crosscat,mit-probabilistic-computing-project/crosscat,fivejjs/crosscat,mit-probabilistic-computing-project/crosscat,fivejjs/crosscat