Changes since tag v1.6.0

commit d4090ec0815ae0b8abfd439cf24448e918fec014
Author: Hendrik Leppkes <h.leppkes@gmail.com>
Date:   Thu Jan 24 14:26:27 2019 +0100

    Update TOC for 8.1

commit 1c3143a04229e239db8cadf8c3331213e5af6223
Author: Hendrik Leppkes <h.leppkes@gmail.com>
Date:   Thu Jan 24 14:25:39 2019 +0100

    Fix minimap jittering of the drawn lines

