Updated version from RPG Ambience
Sublime exclude patterns
Renaming
Copyright year
Functional scene crossfading
Global "toBeBetween" matcher
Refactoring
Further refactoring
Proper signaling of playback status
Stage tests
Stage node accessible through interface

Added a read-only property returning the stage's node, which the `convertScene` method in RPG Ambience needs in order to scale text properly when the scene is in the preview player and not in its own window.