Ensure compatiblity with launchpadlib 1.9.7

This bug is to track any changes that need to be made to this package
to make it compatible with launchpadlib 1.9.7, the version of
launchpadlib currently in Natty. Forgive the formal tone; I'm filing a
lot of these bugs at once.

In late February, I performed an audit of this project's code and
spoke on IRC with the project maintainer, so this should not be a huge
surprise. If Natty already contains a compatible version of your
package, just mark this bug "Fix Released".

If you have any questions, feel free to respond in this bug. For a
guide to the changes in Natty's launchpadlib, see this mailing list
message:

https://lists.launchpad.net/launchpad-users/msg06239.html

My audit did not turn up anything in your package that will be
affected by the new version of launchpadlib, but I'd like you to test
it out yourself to make sure.