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 find any major issues that need to be addressed
immediately, but I'd like you to test it out yourself just to make
sure. I did find some minor issues that can probably be resolved
later, but which might cause deprecation errors, now or in the future:

* References to the deprecated service root 'edge'. Use 'production' instead.
* Many usages of deprecated method Launchpad.get_token_and_login(). Use Launchpad.login_with() instead.