Squashed commit of the following:

commit b884a22563d86cd27c285550c4398ee729d5773d
Author: Marcus Ihde <marcusplate@googlemail.com>
Date:   Thu Apr 3 04:01:21 2014 +0200

    Add "toon effect", when shadows are deactivated.

commit 237ef263ac548c2b7910c855eefc3268b6495fe1
Merge: fa17879 de2b537
Author: Marcus Ihde <marcusplate@googlemail.com>
Date:   Thu Apr 3 03:20:37 2014 +0200

    Merge branch 'master' of https://github.com/nczempin/Turris-Monacoae

commit fa1787983abce40a9eb67b498578945db04540e2
Author: Marcus Ihde <marcusplate@googlemail.com>
Date:   Thu Apr 3 03:20:30 2014 +0200

    Tweak some graphics