Introduce a 3rd _p* field to ebuild naming scheme. This is to capture UVER_PREFIX in ebuild name and so ease version bumping of packages. Some version bumps to act as examples: indicator-{power,datetime}, unity, content-hub. Add version check support for 3rd _p* field in version_check.sh
[utopic] Version bumps
[utopic] Update indicator-datetime systemd-timezone patch
[utopic] Remove deprecated dev-qt/qtjsbackend from package's that no longer use it