Changes since tag 1.7.5.1

commit 2cf89455a858b49bc610cb3f52335e0fe597ffa4
Author: Hendrik Leppkes <h.leppkes@gmail.com>
Date:   Wed Aug 30 08:49:22 2017 +0200

    Update FogClear data for Argus

commit 6975e72c7760af7304132580b058d4844851799b
Author: Hendrik Leppkes <h.leppkes@gmail.com>
Date:   Wed Jul 12 14:16:38 2017 +0200

    Switch to ignoring missing locale strings

