Only upload packages which are installed
Only upload packages which are installed

Fixes issue #9

We use the internal Status field of dpkg-query which corresponds to the
Status field in /var/lib/dkg/status . This has the downside that our
code breaks if dpkg changes the internal representation of the field.
We can't use db:Status-Abbrev because that was added in dpkg 1.16.2 and
precise ships with 1.16.1.2 .

PatchworkSecurity/cleansweep