Make sure reprojection routines work with large images

When reprojecting large images, we may run into memory issues for storing the corners or centers of all pixels, so we should have a way to project chunk by chunk (for all reprojection methods)

The issue does not name files or tests; begin by locating all reprojection methods and tracing where per-pixel corners or centers are allocated. Done means every reprojection method can process large images chunk by chunk without requiring arrays for all pixels at once.

Written by the indexing model from the issue text.