Config command fails if ~/.pachinko.yaml exists

[jvstein]

Found this one when trying to write up issue #6. The following error happens if the ~/.pachinko.yaml file exists and you then run pachinko config.

FATA[0000] 8 error(s) decoding:

* 'inputs[0]' expected type 'string', got unconvertible type 'map[interface {}]interface {}'
* 'outputs[0]' expected type 'string', got unconvertible type 'map[interface {}]interface {}'
* 'outputs[1]' expected type 'string', got unconvertible type 'map[interface {}]interface {}'
* 'processors[0]' expected type 'string', got unconvertible type 'map[interface {}]interface {}'
* 'processors[1]' expected type 'string', got unconvertible type 'map[interface {}]interface {}'
* 'processors[2]' expected type 'string', got unconvertible type 'map[interface {}]interface {}'
* 'processors[3]' expected type 'string', got unconvertible type 'map[interface {}]interface {}'
* 'processors[4]' expected type 'string', got unconvertible type 'map[interface {}]interface {}'

[rbtr]

What's the contents of the file when this occurs? Is it empty, or malformed?