Except the raw MIDI queues, since they're MIDI specific

Documentation saying that they are deprecated is missing

I cannot test this locally due to lack of hardware

I don't know how useful it is yet, maybe I'll remove it later on (tell me if you don't like it)

@x42 Will this work? I am not confident about this

There are only two now, `gAudioPortType` and `gMessagePortType`. There is a string constant for `JACK_DEFAULT_MIDI_TYPE` which will be handled separately.

- Added inline helper methods to create ports of the correct type
     - Had to move `jack_port_uuid` to the top because we still can't use methods declared below in 2019
    - I'd like to add helper methods that automatically set the metadata but C has no method overloading?!
- Improved metadata documentation
- Registering a port with the `JACK_DEFAULT_MIDI_TYPE` will automatically change it to `JACK_DEFAULT_MESSAGE_TYPE` for forward  compatibility.