Log Message:
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.