v1.2 Added Tracking/Untracking and renamed EntitySet.getSet() to EntitySet.getEntities()
v1.2 Added Tracking/Untracking and renamed EntitySet.getSet() to EntitySet.getEntities()

Aldo111/incremental-game-engine-js,Schenn/incremental-game-engine-js,Schenn/incremental-game-engine-js