windows-only problem with launchpad plugin

[Martin Pool]

https://bugs.launchpad.net/bugs/124899

There seems to be something strange happening with the registration of
the lp: plugin on Windows.  I can't reproduce it in 0.19dev on Ubuntu.
 Could anyone investigate this and see if they can reproduce it or
diagnose it?  I wonder if the plugin code is interacting badly with
the way things are packaged into a zip on windows.

-- 
Martin