Pull in gnome-extra/zeitgeist so it gets built with vala-0.20 only and applies Unity patches
Workaround qtcore-5.2.0_beta1 bug (see https://codereview.qt-project.org/#change,69329) and update qt5-build.eclass
Add ~amd64 ~x86 to missing KEYWORDS for mir-base/mir and mir-base/unity-system-compositor
Add 'cloud' USE to unity-base/unity-meta to enable/disable UbuntuOne cloud storage (enabled by default), and re-order some ubuntuone deps. so that unity-base/ubuntuone-control-panel sits at the top of the deptree pulling in ubuntuone-client and ubuntuone-client pulls in ubuntuone-client-data