Created Get Object Function

This was created to be able to retrieve an object from a private
container.

Example usage in controller to output object to browser and force
download:-
$object = $this->opencloud->get_object($file->file_name);

					$this->output->set_header("Content-type: " .
$object->content_type);
					$this->output->set_header("Content-Disposition: attachment;
filename=" . $object->filename);
					$this->output->set_output($object->content);