Merge pull request #24 from wallyhall/master

Fix for RuntimeException namespace resolution

Author: Parvindersib

src/Sendinblue/Mailin.php

@@ -48,10 +48,10 @@ private function do_request($resource, $method, $input)
         curl_setopt($ch, CURLOPT_POSTFIELDS, $input);
         $data = curl_exec($ch);
         if (curl_errno($ch)) {
-            throw new RuntimeException('cURL error: ' . curl_error($ch));
+            throw new \RuntimeException('cURL error: ' . curl_error($ch));
         }
         if (!is_string($data) || !strlen($data)) {
-            throw new RuntimeException('Request Failed');
+            throw new \RuntimeException('Request Failed');
         }
         curl_close($ch);
         return json_decode($data, true);