v0.3.0

• Add optional placementHint parameter for better control over where notes are placed. Notes are still constrained near the perimeter of the target graphic, but placed in the direction of the placementHint.
• When positioning notes, anchor them to 8 fixed points on the note (e.g. center top, middle right, center bottom, middle left, and each of the 4 corners) based on their direction. This provides increased stability / less jumpiness, for example when notes are rapidly re-positioned as the user types.