Fix stop_vm().
Return None when an entity is not found.
Complete our Fabric support.
Add my email address.
Some Py3k improvements (but still not supported).

We are pretty close but Fabric needs to support Py3k first..
Windows is currently only partially supported.

See https://github.com/fabric/fabric/issues/489.
Python 2.6 fixes.
Version 0.9.11.