v0.7.0 release

See #60 for the details.

ktmidi 0.4.0

Today we tagged the latest release as v0.4.0. There have been too many changes since 0.3.0 so I gave up enumerating what's new. Some items that come up in my mind are -

• there is now the api definition based on metalava.
• Now we have RtMidi support, in ktmidi-jvm-desktop (JNA) and ktmidi-native-ext (cinterop) packages.
• Midi2Player and Midi2Music became really usable, proved as in player-sample (JVM and Native).
  • Midi2Music supports SMF-like delta time in its pseudo JR Timestamp messages
  • Midi2Music supports SMF meta events in certain sysex8 formats so that it can store tempo changes etc.
• UmpTranslator converts UMPs to and from MIDI 1.0 bytestreams.
• MidiCIFactory and MidiCIRetrieval offer binary generation and parsing, of MIDI-CI sysex bytes.
• MidiCIConnection provides basic MIDI-CI initiator/recipient workflows.