[Swan-commit] Changes to ref refs/heads/master

[Antony Antony]

New commits:
commit 99931d255554c229541ed0e115a994306f5b8bc9
Author: Antony Antony <antony at phenome.org>
Date:   Tue Dec 12 15:50:28 2017 +0100

    Makefile: add include mk/docker-targets.mk

commit 758889b219ed69abe8e4d7cbc91fe80de8f1416a
Author: Antony Antony <antony at phenome.org>
Date:   Tue Dec 12 17:32:57 2017 +0100

    update .travis.yml
    
    tested Fedora 27 and F26, Ubuntu - Artful and Xenial, and CentOS 7