modified offline terminology to be in line with paper (ie theta1, theta0 -> PL, PD)
Merge branch 'master' of https://github.com/drphilmarshall/SpaceWarps

merges are a good thing
allowed EM_algo to customize min,max steps, epsilon for ending
Merge branch 'master' of https://github.com/drphilmarshall/SpaceWarps

merging my doc with phil's
of course, one should not make silly coding errors, too
Even though I need to rerun to make the roc and purity curves, I might as well commit these changes