ClientIP attempts to grab an IP address from the `X-Forwarded-For` header or the remote address.

Contentware sets the response `Content-Type` header.

DefaultClient is a function rather than a var (as in the http pkg) because it includes a circuit breaker so it should not be used as a client for multiple services.

Error writes a standardized error struct.

Logware logs requests.

RequestDecoder wraps a http.Request.Body with either a JSON or XML encoder based on the request `Content-Type` header.

Respond encodes an JSON or XML response after writing a status code.

ResponseDecoder wraps a http.Response.Body with the either a JSON or XML encoder based on the response `Content-Type` header.

ResponseEncoder wraps a http.ResponseWriter with the either a JSON or XML encoder based on the previously set response `Content-Type` header.

GlobalContentTypePolicy is a global variable that should not be changed while handlers are active.

Client wraps http.Client while adding retry and circuit breaker functionality.