Adds combined piano audio file.
Merge branch 'master' of github.com:colinbdclark/artwork

* 'master' of github.com:colinbdclark/artwork:
  Updates conductor to the new performer IP addresses.
  Fixes buggy halfspeed for guitar and piano.
  Cuts the tempo of the piano and guitar in half.
  Smoother tempo changes on the drums.
  Adds support for bass modulation and several new unit generators.
  Adds a lag filter to smooth the quantized changes.
  More parameter tweaking for motion clocks.
  More tweaking of incoming motion values to sound nice when quantized.
  Quantizes the pulse changes and tweaks other parameters.
  Fixes bug where motion data was being sent to non-existent ugens.
  Introduces static vs. motion clocks. Makes piano and guitar temporarily static.