New features

Removed interval parameter from MidiClockSettings.CreateTickGeneratorCallback.
Turned ITickGenerator to TickGenerator abstract class.
Added RepeatStarted event to Playback.
Made constructors of MidiEventReceivedEventArgs and MidiEventSentEventArgs public to have ability to fire corresponding events in custom input/output devices.
DevicesConnector now uses IInputDevice instead of InputDevice.
Removed IDisposable from DevicesConnector.
Added AreDevicesConnected property to DevicesConnector.
Added Parse/TryParse to Octave.
Added INotifyTimeChanged interface on TimedEvent, Note and Chord.
Added INotifyLengthChanged interface on Note and Chord.

Small changes and bug fixes

Chords parsing uses CNT now.
Fixed: Multi-thread access to active notes metadata inside Playback can cause exceptions.
Fixed: Playback.EventPlayed not fired for meta events (#82).
Fixed: Slash chord name contains Sharp instead of # for sharped notes as result of GetNames.