PMHTTP v4.4.0

• Fix a bug when parsing images where we passed the wrong value for the type identifier hint, resulting in a warning being logged to the console (#62).
• Add computed properties on HTTPManagerError for convenient access to the associated values (e.g. .response, .body, etc).
• Add computed property HTTPManagerError.statusCode that returns the failing status code for the error, or nil for .unexpectedContentType (#60).
• Add Obj-C function PMHTTPErrorGetStatusCode() that returns the failing status code for the error, or nil for PMHTTPErrorUnexpectedContentType or for non-PMHTTP errors (#60).
• Provide PMHTTPStatusCodeErrorKey user info key for more error types (#59).
• Add computed property URLResponse.isUnmockedInterceptedRequest that can be used to test if a response comes from a request that was intercepted by the mock manager without a mock installed (#46).