Make a clean build for best results!

Squashed commit of the following:

commit fdc03dbfd47d8071303bd4c58394d70b58ab1f4e
Author: Wolthera van Hövell <griffinvalley@gmail.com>
Date:   Sun Jan 31 15:16:37 2016 +0100

    Cleanup

    This introduces a little bug in the trc again, but I suposse this works for now.

commit c42e5c93cd9f33dc92927100c5aa47c5d8814b8b
Merge: 4b5806d c2706b36
Author: Wolthera van Hövell <griffinvalley@gmail.com>
Date:   Sun Jan 31 12:45:40 2016 +0100

    Merge branch 'master' into krita-testing-wolthera

commit 4b5806d06ce7c7ad06245489355f4e0f5573f0b7
Merge: 5f4ae5e 97a2851e
Author: Wolthera van Hövell <griffinvalley@gmail.com>
Date:   Sat Jan 30 17:25:57 2016 +0100

    Merge branch 'master' into krita-testing-wolthera

commit 5f4ae5e01ec4596172908502fff048ff10ff41a2
Author: Wolthera van Hövell <griffinvalley@gmail.com>
Date:   Sat Jan 30 16:04:59 2016 +0100

    Make the trc curve widget work for cmyk

commit 95ba47ebe0b1a5394621ef82c7e280746b9c...