[NEW] Property syntax

• Using dot notation like this scale.x.y on the property and about processing takes cares es6-tween and fast
• 3-level parsing dot notation syntax parsing

[NEW] Getter/Setter

• Automatic matching getter-only properties (like one in Three.js) and don't tween that for performance reason. No one tweening engine can't do this except es6-tween with good performance...
• Skipping getter-only properties setting for fail-safe tweening

[NEW]

• Relative on the all of the property
• Dot notation on the all of the property
• Per-subproperty or all-subproperty with dot-notated easing matching Easing feature (huh...)

Improvements

• Reduced object size on Garbage Collection of browsers