TIFF file handling in PIL

# TIFF is a flexible, if somewhat aged, image file format originally
# defined by Aldus. Although TIFF supports a wide variety of pixel
# layouts and compression methods, the name doesn't really stand for
# "thousands of incompatible file formats," it just feels that way.

thousands of incompatible file formats, 這個的確有挖苦到 TIFF 這個格式 XD