Prepare for test modules sharing font options.

Do not expose modules unnecessarily.

Fix compatibility with base < 4.15.

Make demo font size better match window.

Improve terminology around fragments.

Bump version to 0.3.0.1.

Fix documentation: missing Paginable.

Fix documentation: missing SpanOptions.

Make sure cabal.project is included in distribution.

Set release date for v0.3.0.0.

Fix documentation: document remaining names.

Fix documentation: export dependencies of exported names.

Fix documentation: incorrect reference.

Fix documentation: references to non-imported names.

Fix documentation: references to local names.

Properly configure Haddock documentation.

Separate internal plain Paragraph/ParagraphLayout.

Clarify changelog.

Expose text slicing functions.

Decompose text slicing.