static public void copyStream(InputStream is, OutputStream os) throws IOException {
		copyStream(is, os, DEFAULT_TRANSFER_BUFFER_SIZE);
	}
static public void copyStream ( InputStream is , OutputStream os ) throws IOException { copyStream ( is , os , DEFAULT_TRANSFER_BUFFER_SIZE ) ; }
Copy all the bytes from an input stream to an output stream.
@param is Stream to read bytes from
@param os Stream to write bytes to
@throws IOException