Fixed/updated some debian packaging stuff

I fixed somethings from debian packaging, at least it's possible to make a package using launchpad recipe (very useful).

Take a look: https://groups.google.com/forum/#!topic/cabrio-fe-dev/6DvzAdRxt3o

There are some lintian E/W yet:

Now running lintian...
E: cabrio changes: bad-distribution-in-changes-file unstable
W: cabrio source: debian-rules-missing-recommended-target build-arch
W: cabrio source: debian-rules-missing-recommended-target build-indep
W: cabrio: latest-debian-changelog-entry-without-new-version
W: cabrio: description-synopsis-starts-with-article
W: cabrio: duplicate-font-file usr/share/cabrio/fonts/FreeSans.ttf also in fonts-freefont-ttf
W: cabrio: binary-without-manpage usr/bin/cabrio
Finished running lintian.