RFS: python-hl7 0.2.2

[John Paulett <john@paulett.org>]

There is a new python-hl7 upstream release, which adds an option to
the mllp_send command [1].

In addition to packaging this new upstream release, I added a manpage
for mllp_send and fixed #645262 (missing python-pkg-resource
dependency).

Could a DD please check over my work, and if it looks ok, upload the
package [2].  If there are any improvements I can make, please let me
know.

Thank you!
John Paulett

[1]: http://python-hl7.readthedocs.org/en/latest/changelog.html
[2]: http://anonscm.debian.org/viewvc/python-modules/packages/python-hl7/trunk/debian/