Translate "uncased" keys in response bodies to snake case

[gsterndale]

This should probably be a configuration option.

[nicholaides]

I can think of 2 approaches for this:

1. Simply convert all keys to snake case. For example, if you were to print out a response, you would see: disk_bytes_read_rate instead of diskBytesReadRate and cloud_identifier instead of cloudidentifer. This would be the ideal, in my mind.

The challenge is that there are ~475 keys that we would need to get right (https://gist.github.com/nicholaides/7185973). It doesn't seem feasible or robust to maintain a list of translations or even a list of rules that would help us translate.

1. Another option would be to make the response objects have "indifferent access", as we did with requests. For example, if you try to access the key disk_bytets_read_rate or diskbytesreadrate, it would give you the key diskBytesReadRate.

Given the challenging nature of option 1, I think option 2 is best.