Add ColourManagerFactory

Change-Id: I6ef45d10a4fe862854702eee671114ee09f01d4d
Depends-On: If1bc20d15561584c9296ad10f04957efb51c5966
Reviewed-on: http://gerrit.dmdirc.com/3865
Reviewed-by: Chris Smith <chris@dmdirc.com>
Automatic-Compile: DMDirc Build Manager
Update submodules: plugins (new commits)

plugins:
    5956243 Greg Holmes <greg@dmdirc.com>
            Use ColourManagerFactory

            Depends-On: I6ef45d10a4fe862854702eee671114ee09f01d4d
            Gerrit: http://gerrit.dmdirc.com/3867

Change-Id: Ifd3032f684bb064b393172991f822a6c0c01722a