latest refactoring in ataviser
get rid of all the __back_* files
recompute the goofed up 0100 priors
Merge branch 'master' of github.com:bryanduxbury/charlietime

* 'master' of github.com:bryanduxbury/charlietime:
  remove some cruft; add the real deal method for advancing the clock minute by minute
  gitignore .DS_Store
  prototypes for nice linear fade in/out and crossfade effects
  clean up some cruft; latch the 'next state' button so it doesn't run faster than humans can see
  extract a function
  fixed the issues with toroidal life (it's working now)