add desktop, icon and setup files

data/gpk-application.desktop

data/gpk-update-viewer.desktop

data/icons/16x16/status/collection-available.png

data/icons/16x16/status/collection-installed.png

data/icons/16x16/status/package-add.png

data/icons/16x16/status/package-available.png

data/icons/16x16/status/package-blocked.png

data/icons/16x16/status/package-cleanup.png

data/icons/16x16/status/package-delete.png

data/icons/16x16/status/package-download.png

data/icons/16x16/status/package-downloaded.png

data/icons/16x16/status/package-info.png

data/icons/16x16/status/package-installed.png

data/icons/16x16/status/package-search.png

data/icons/16x16/status/package-sources.png

data/icons/16x16/status/package-update.png

data/icons/16x16/status/refresh-cache.png

data/icons/16x16/status/rollback.png

data/icons/16x16/status/service-pack.png

data/icons/16x16/status/setup.png