Return the default gridSize and compression for the field 9.309 if not provided (0.20mm and uncompressed)

The NISTf.get_minutiae() function returns a empty AnnotationList instead of raising an Exception if no minutiae data is found

Add the function hash() to return the md5 of the file written to disk (the NIST object beeing cleaned before the calculation of the hash)

Change the priority of resolution setting in the set_print() function (first the res parameter, then the PIL included resolution)

If the resolution can not be found in the current ntype (as defined in the list), the next one is tested