Significant changes

• FlexASIO is now bundled with the latest PortAudio master (76e31c2) instead of the stable version (pa_stable_v190600_20161030). This brings the following improvements:
  • Fix a bug where the WASAPI backend could get the device channel count wrong with some audio hardware. See PortAudio change, #3.
  • The WASAPI backend doesn't handle a zero suggestedLatencySeconds option specially anymore. See PortAudio change.
  • Various other WASAPI improvements.
  • See PortAudio git for a detailed list.