Cloud map is used for both land and water. Foreground now uses seeded
random number generator for reproducibility of results.

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.

Add files from create-next-app