Use Result 'monads' for responses

[peterberkenbosch]

Right now we rely on Exceptions being thrown when operations are unsuccessful. This makes using this gem a bit dirty.

An implementation right now would need to rescue specific Exceptions to handle the flow and/or re-raise the Exception.

Opening this issue to come up with a better solution for this, wrapping responses in a Response object that implements success? and encapsulates data returned.

also did a quick poll on twitter