It seems a good idea, and another safety net, to run the selftests
during the build of packages. For now, it's not trivial to run the
functional tests, so let's at least run the unittests.

Another current limitation is that unittests are only run on Fedora
and not on EL6 or EL7, and the reason for that are missing
dependencies on both EPEL6 and EPEL7.
Signed-off-by: NCleber Rosa <crosa@redhat.com>

This means that we include the Makefile in the source tarball and just
use the `man` target.

With regards to portability among Python version, this should not be
an issue as rst2man on the system itself will the correct version. In
a sense, it's just another utility, it doesn't really matter it's
written in Python.
Signed-off-by: NCleber Rosa <crosa@redhat.com>

Signed-off-by: NLucas Meneghel Rodrigues <lmr@redhat.com>

Package plugin resource files, as they're necessary to
the given plugin's functionality. Update MANIFEST.in
with the new data dir.
Signed-off-by: NLucas Meneghel Rodrigues <lmr@redhat.com>

Signed-off-by: NRuda Moura <rmoura@redhat.com>