Move Colour to utils.

Change-Id: Icb4de047bfada18231b66011838958974282a322
Depends-On: I73c10f367e5972031d1c9b0871c4cb9043008bec
Depends-On: Ibf9936e6cf89ebbe1243e1c32596bc726bebc5ce
Reviewed-on: http://gerrit.dmdirc.com/3860
Automatic-Compile: DMDirc Build Manager
Reviewed-by: Chris Smith <chris@dmdirc.com>
Update submodules: plugins (new commits), util (new commits)

plugins:
    25db137 Greg Holmes <greg@dmdirc.com>
            Move Colour to utils.

            Depends-On: I73c10f367e5972031d1c9b0871c4cb9043008bec
            Gerrit: http://gerrit.dmdirc.com/3859

util:
    e57c5df Greg Holmes <greg@dmdirc.com>
            Move Colour to utils.

            Gerrit: http://gerrit.dmdirc.com/3858

Change-Id: I501b323f67ebafc889dc114a804819ee31491f87