Add HTTP properties to generic error

Allows generic HTTP error to accept more detailed information about the response from the server.

src/Mailgun/Connection/Exceptions/GenericHTTPError.php

@@ -1,6 +1,25 @@
 <?php
 namespace Mailgun\Connection\Exceptions;
 
-class GenericHTTPError extends \Exception{}
+class GenericHTTPError extends \Exception
+{
+	protected $httpResponseCode;
+	protected $httpResponseBody;
+	
+	public function __construct($message=null, $response_code=null, $response_body=null, $code=0, \Exception $previous=null) {
+		parent::__construct($message, $code, $previous);
+		
+		$this->httpResponseCode = $response_code;
+		$this->httpResponseBody = $response_body;
+	}
+	
+	public function getHttpResponseCode() {
+		return $this->httpResponseCode;
+	}
+	
+	public function getHttpResponseBody() {
+		return $this->httpResponseBody;
+	}
+}
 
-?>
+?>