---
Added
- Added `prep_imdata()` to Tile and Tile subclasses. This method can
be used to prepare image data before feature detection and matching,
for example, by converting a 16-bit image to an 8-bit image.
Changed
- Fixed bug stitching mosaics that have not been aligned and that have
inconsistent row heights or column widths. The tiles making up each
row must still have the same height, and those making up each column
must have the same width.
- The `Mosaic.align()` method now raises RuntimeError if it fails to
detect any features or align at least two tiles.