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
Looking at application as an example

```
application.container
 $> [ "/api/v1/containers/key1", "/api/v1/containers/key1"]
```

I'd like to preserve valid parsing but be able to do this:
```
application.container
 $> [ Fog::Tutum::Compute::Server object, Fog::Tutum::Compute::Server object]
```

One option is to set up a simple def application_containers, which separates everything, preserved parsing, and only calling application_containers gets you the objects.

Another option might be to add an alias for containers -> raw_containers, and then write a def containers to pull the objects.