Upgrade to OPENRNDR 0.4 snapshot

orx-jvm/orx-midi/README.md

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+# orx-midi
+
+Basic MIDI support for keyboards and controllers. Send and receive note and control change events. 
+
+Orx-midi is a wrapper around javax.midi.
+
+## Usage
+
+```kotlin
+
+// -- list all midi devices
+MidiDeviceDescription.list().forEach {
+    println("${it.name}, ${it.vendor} r:${it.receive} t:${it.transmit}")
+}
+
+// -- open a midi controller and listen for control changes
+val dev = MidiTransceiver.fromDeviceVendor("BCR2000 [hw:2,0,0]", "ALSA (http://www.alsa-project.org)")
+dev.controlChanged.listen {
+    println("${it.channel} ${it.control} ${it.value}")
+}
+
+// or program changes
+dev.programChange.listen {
+    println("${it.channel} ${it.program}")
+}
+```
+
+## Further reading
+
+The OPENRNDR guide has a [section on orx-midi](https://guide.openrndr.org/#/10_OPENRNDR_Extras/C04_Midi_controllers) that provides step-by-step documentation for using orx-midi in combination with OPENRNDR.