[Saucy] Version bumps for libaccounts-glib,gnome-settings-daemon,mir,unity-system-compositor,signon-ui,webapps,unity-indicator-{bluetooth,datetime},xorg-server,accounts-qml-module,libaccounts-qt and lightdm
[Saucy] Have unity-base/ubuntu-sso-client use virtual/python-imaging instead of dev-python/imaging. Latest virtual/python-imaging uses dev-python/pillow exclusively and so does Ubuntu, so soft block dev-python/imaging
[Saucy] adjusted keywords