Windows Compatability (again...)

I've removed all references to pipes in the code and refactored to make the pipe calls local socketpairs.  This ensures that the code runs on Windows (and, I believe Linux).  

There is quite a lot of chatter on various sites about Kazoo not working on Windows and since Kazoo is hoping to be the "one true pythonic zookeeper interface", it makes sense to support windows properly.  As it stands in the current release, it's just completely broken.