corrections to markov.py to remove mutable default arguments
switch to consistently using @property-based semitone property; extensions to Scale and Chorc
remove print output from Timeline; comments in Util
add first harmony-based pattern generators
further support for WeightedScale; add PNoRepeats; allow creation of PMarkov objects directly from a Scale
add support for running as a high-priority thread; naive implementation of chord support in timeline
add PRange