added compression header

Author: shokohsc

src/Chadicus/Marvel/Api/CurlAdapter.php

@@ -33,6 +33,7 @@ public function send(Request $request)
             CURLOPT_HEADER => true,
             CURLOPT_FORBID_REUSE => true,
             CURLOPT_HTTPHEADER => $curlHeaders,
+            CURLOPT_ENCODING => 'gzip,deflate',
         );
 
         if (strtoupper($request->getMethod()) !== 'GET') {