MIDI output

Space deployment

Updated link to model list in README.md

Replaced empty cancel callback with lambda (our previous solution).

Added empty cancel callback.

Updated branch references to main PyHARP / HARP branch.

Merge pull request #40 from TEAMuP-dev/develop

Removed unused parameter from midi synthesizer example.

Merge branch 'main' into develop

Cleanup for core and package files.

Remaining cleanup of examples.

Added midi synthesizer example back as raw files.

Removed midi synthesizer submodule.

Added midi synthesizer example.

Updated README for v3, pitch shifter example, and added optional timestamps to file name.