Expose rect unions in public interface.

Bump version to 1.1.1.0.

Set release date for v1.1.0.0.

Update changelog on numbers and neutrals.

Update changelog on fragment order.

Update changelog on text with no strong direction.

Bump version to 1.1.0.0.

Set release date for v1.0.0.1.

Describe manual testing of pagination.

Bump version to 1.0.0.1.

Set release date for v1.0.0.0.

Handle ancestor boxes in rich layout.

Add ancestor boxes to interface.

Add required textDirection to TextOptions.

Deprecate ParagraphConstruction.

Deprecate the Plain interface.

Add public Rich interface.

Add user data to spans.

Add line numbers to laid out fragments.

Qualify Plain interface.