[libqmfclient] Modify .provider/.service to be less generic

Previously, the .provider and .service files used very generic names
and icon values.  Also, the default icon value was specified via a
relative path, which might not exist.  This commit renames both the
provider and service to be less generic, and removes the possibly
invalid icon specification.
Merge pull request #2 from chriadam/master

[libqmfclient] Modify .provider/.service to be less generic