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.

Integrate BiDi reordering.

Implement BiDi resolved level reordering.

Bump version to 0.3.0.0.

Represent lines with non-empty lists.

We can do this because we removed lines with zero size.

Remove lines with zero size.

These lines would otherwise affect line numbering.

Do not re-export through the Plain module.