Fix the application name for gnome-weather

gnome-weather is the tarball, repository and package name,
but the application ID is org.gnome.Weather.Application,
following the new recommendations from last GUADEC.

https://bugzilla.gnome.org/show_bug.cgi?id=707185
packagekit-refine: implement refining from package-name to package-id

This is necessary to actually install the applications (or remove,
in case we want to remove a featured app that didn't go through
packagekit)

https://bugzilla.gnome.org/show_bug.cgi?id=707185
hardcoded-popular: fix .desktop file names

https://bugzilla.gnome.org/show_bug.cgi?id=707185
ifdef out assertions for now

Otherwise, this thing just doesn't work.