[ubuntu-art] adium-theme-ubuntu: some improvements

[Nicolò Chieffo]

Hello, I've opened some bugs (with patches) [1] [2] [3] long ago, to
make some small tweaks to adium-theme-ubuntu.
I really need someone to review them, since the patches are small and
ready to be looked at, but apparently adium-theme-ubuntu has no
maintainer (iTorrey does not answer).

Thanks for your time.

[1]: https://bugs.launchpad.net/ubuntu/+source/adium-theme-ubuntu/+bug/542806
[2]: https://bugs.launchpad.net/ubuntu/+source/adium-theme-ubuntu/+bug/531811
[3]: https://bugs.launchpad.net/ubuntu/+source/adium-theme-ubuntu/+bug/595007