Make Requests_Transport_cURL::stream_body() public

Fixes a "cannot access protected method Requests_Transport_cURL::stream_body()" error when using PHPUnit and PHP-VCR.

Related issues: #157 and php-vcr/php-vcr#109

Author: justinstern

library/Requests/Transport/cURL.php

@@ -459,7 +459,7 @@ public function stream_headers($handle, $headers) {
 	 * @param string $data Body data
 	 * @return integer Length of provided data
 	 */
-	protected function stream_body($handle, $data) {
+	public function stream_body($handle, $data) {
 		$this->hooks->dispatch('request.progress', array($data, $this->response_bytes, $this->response_byte_limit));
 		$data_length = strlen($data);