Version bump to 0.9.6.1

AUTHORS update; refer to in-application about dialog

set version to 0.9.6-RC2

tag version as rc1

Set version to 0.9.6-beta3

Tagging 0.9.6-beta2

Convert "0.9.6-beta1" to a proper git tag.

Convert "0.9.5.1" to a proper git tag.

Convert "0.9.5" to a proper git tag.

Convert "0.9.5-rc1" to a proper git tag.