Http\Response: tests all buffers for chunk_size = 0
Http: invisible garbage for IE is sent if Content-Type contains parameters (e.g. charset=utf-8)
Strings::random uses openssl_random_pseudo_bytes, mcrypt_create_iv or /dev/urandom is available. openssl_random_pseudo_bytes is not used on Windows for PHP < 5.4, because is terrible slow.
Typos