Release 1.13.1 Maintenance release with fixes for hierarch/longstring and rewrite bugs Maintenance release with fixes for hierarch/longstring and rewrite bugs. Other changes in this edition include: - After the correction of #44 the padding calculation of the fits header was wrong, now the calculation is consistent. - Improved the calculation of the number of cards to be used for a longstring in case of a hierarch cards because it was wrong when some special string lengths where used. Now rewriting is useing the new calculation to see if the header fits in place. - More variants of the hierarch keywords as in #16. - More variants of the hierarch keywords allowed (lowercase and dot), but writing will convert the keywords back to the standard.