Add a man page for cloudprintd

Linked to cloudprint(1), placed in section 8.
Move the clouprintd auth to /var/lib/cloudprintd

It was at /var/lib/cloudprint. Check for the old auth files and
directory in postinstall, and clean up if found.
Move cloudprint-service man to section 7

It was in 8, but there is no cloudprint-service binary.
clean: Remove reference to README.md

This was a cloudprint-service README, for display on github. Now
that builds use git-buildpackage, this can no longer be supported.
Update copyright to 2014

In the man pages and the copyright file.