Fix tile generation, and set default map width.

Use client instead of offset sizes to exclude scrollbar in calculating
scroll amounts.

Check if target scroll container does not need to scroll in order to
preserve scroll of other scroll container.

Organize code into services.

Honor Mercator's growing bounding box.

Use other image name.

Use a smaller version image for header and larger sample output for the
footer.

For showcase

Add links to SMWar repo.

Ensure SMWar is present.

Add files from create-next-app