Changes between releases 3.20 and 3.31

Version 3.31

* Bug correction in input_map routine for reading of polarized multi-HDU cut sky FITS files;
* Introduction of winfiledir_* and windowfile_* qualifiers in alteralm facility.

Version 3.30

* anafast now produces nine spectra (TT, EE, BB, TE, TB, EB, ET, BT and BE), instead of six previously, when analyzing two polarized maps
* CFITSIO version 3.20 (August 2009) or more now required

Version 3.31, 2017-01-06