WIP - Adding tutum support

This is a WIP PR for adding tutum support to fog.

Tutum is a docker container PAAS providing three main models, containers, images and applications. An application consists of N containers based off of the same image. 

Still todo

* Add requests and tests
* Get all tests working
I'm not sure there is a particularly improved way. One danger here is if the version changes or if some action should use a different version. I think for other providers, the prefix is just duplicated out to all of the requests. Which obviously also doesn't seem ideal.