CheckResponse returns an error (of type *Error) if the response status code is not 2xx.

ExpandURL subsitutes any {{encoded}} strings in the URL passed in using the map supplied.

ResolveRelative combines a url base with a relative path.

Error contains an error response from the server.

ResponseMetadata is embedded in each response and contains the HTTP response code and headers from the server.

JSONTime assumes the time format is RFC3339.