New features and improvements

Concept of the IObjectId removed. Please read updated SplitByObjects section of the docs.
Added filter parameter to SplitObjectsAtDistance, SplitObjectsByGrid, SplitObjectsByPartsNumber and SplitObjectsByStep methods of the Splitter.
Added PlaybackHint.
Improved performance of the TimedObjectsManager.SaveChanges method.
Improved performance of the TimedObjectUtilities.AddObjects method when target events collection is empty.
Improved performance of time changing methods of the Playback.

Small changes and bug fixes

Implemented TempoMap.Equals.
Added max value constants in the SmpteOffsetEvent.
Fixed: Current time is managed improperly in the MidiClock when there are speed changes.
Fixed: NotesPlaybackStarted and NotesPlaybackFinished events of the Playback can be fired with empty notes collection.