The pano13 library is the backend library used by many applications. Also included are: * PTOptimizer, a utility for optimising control points. * panoinfo a utility for querying the library version. * PTmender a replacement for PTStitcher. * PTblender implements just the colour and brightness correction of PTmender. * PTtiff2psd Converts a set of TIFF files into a PSD file. * PTuncrop Converts 'cropped TIFF' files into 'normal' TIFF files.