Update submodules: defaults (new commits)

defaults:
    4dfc47c Shane Mc Cormack <shane@dmdirc.com>
            Fix LICENCE file name and add AUTHORS file.

            Gerrit: http://gerrit.dmdirc.com/2647

Change-Id: Ibec2144e8965a96a54798b02b7da450ebf4e991a
Update submodules: installer (new commits)

installer:
    d6d9123 Shane Mc Cormack <shane@dmdirc.com>
            Fix LICENCE file name and add AUTHORS file.

            Gerrit: http://gerrit.dmdirc.com/2648

Change-Id: I0e1d67b708ca146fd58f145c657abde981473fda