Attempt to add clarifying messages to API call errors

[jasonrush]

Figure out how to add better support for API call errors (ie preferrably display a more human-readable message along w/ the returned/received HTTP result, not just 404's).

https://developer.cisco.com/meraki/api/#/rest/guides/errors

[jasonrush]

Possibly create an additional set of logging variables and an additional set of functions to get the error information in more standard readable ways?