Code generator doesn't handle response being empty and results are in the HTTP headers

[matthewkmayer]

Seen when implementing http://docs.aws.amazon.com/AmazonS3/latest/API/RESTBucketPUT.html :

Update code gen to be able to read response from header if that's where the JSON definition says it is.

[matthewkmayer]

After talking with some AWS employees at reinvent there are a few different standards for API interaction. We should make the code generation smart enough to handle those.

They were... highly, highly encouraging code gen as the primary method of making things work instead of hand coding.

This ticket may morph into making it handle S3 stuff better.

[matthewkmayer]

I'm going to close this because it's being addressed in PR #90.