3.0.1: fix for migration error on upgrade to 3.0.0 (jazzband#1491)

Release 3.0.0 Changlelog, version and minor version dependency update…

…s. See also jazzband#1474 (jazzband#1485)

Release 2.4.0

Release 2.3.0

Release 2.2.0

Release 2.1.0

Release 2.0

Release 1.7.1

Release 1.7.0 (jazzband#1096)

Bufgix release 1.6.3