Full pitch freedom and polyphonic pitch bends over MIDI

This is a huge, feature-rich release!

• New: Support JIT-based MIDI-out
  • This means any pitch can be played without having to pre-tune the MIDI device
  • It is possible to update/bend a currently sounding note polyphonically
• Improvement: All tuning message types and control parameters from tune-cli are available
  • realtime / device ID / tuning program / ...
• Improvement: Both AOT and JIT live retuning can be used for MIDI-out
  • When tuning mode is "Fixed": Use AOT model
  • When tuning mode is "Continuous": Use JIT model
• Improvement: Display the tuning message type
• Improvement: Upgrade to Nannou 0.18.0
  • This should result in less non-Rust build dependencies
• Change: The CLI of microwave and tune-cli have been harmonized
  • The available tuning methods are full, full-rt, octave-1, octave-1-rt, octave-2, octave-2-rt, fine-tuning and pitch-bend
• Change: The --tun-method parameter is now mandatory if --midi-out is provided
• Change: To toggle between the tuning modes "Fixed" and "Continuous" use Ctrl+T (instead of Ctrl+C)