+----------------------------------------------
+0.2.17 (to be announced) "isotropic threshold"
+----------------------------------------------
+
+Only bugfixes and cleanups in this version which marks the end of
+the 0.2.x series if no serious bugs show up after the release.
+
+ - be more carful wrt. signed vs. unsigned argument passing.
+ - cleanup error.h and fix some references to invalid error
+ codes.
+ - update to gengetopt-2.20
+