reduced responsibilities of constructors
started using more pointers.
sessions through app rather than app itself.
mostly split view away from app (still hard coded)
haven't decoupled sorts from timers as their actuator yet
couldn't figure out how to handle sortstate, eventually put it into
bsort class. should be split into timeraction and steppable. and there
shouldn't be a random steppedbsort in App
lyrgb