fig local_port

Include some earlier branches:

* the verbose flag
* some bug fixes and test cleanup

Adds a new fig command: `fig local_port` for printing the local port binding.
We can also use this from python code:

```python
def get_service_port(service_name, port, number=0):
    service = command.Command().project.get_service(service_name)
    return service.get_container(number=number).get_local_port(port)
```