Don't rewrite config files we didn't touch
Actually add the travis file!
Add tests (transport level) for AWS integration

Once we have this fully tested, we'll be able to rewrite the deployment
part of Cactus. Once this is done, we can consider swappable deployment
backends (boto, libcloud), which may let us support Python 3 although
Boto does not, at the moment, support it.
Added test infrastructure
Add support for python 2.6
Merge branch 'py26'