add sakura solarized information and ubuntu repository

The latest devel levels of sakura support the solarized palette.  However,
AFAIK this isn't avilable through any formal source, so to make my life easier
across multiple machines, I've built my own package.

As it's in a launchpad PPA, there's no reason other people can't use it as well,
at least until ubuntu catches up to the development trunk :)