Fixed broken context manager __exit__

    def close(self):

        """Both clear the stream, and delete any associated on-disk data"""

        log("Closing {}".format(self.id))

        self.delete_stream()

        if not self.keep_on_disk:

            self.delete_file()

    # HANDLE CONTEXT MANAGER AND FILE CLOSING

    def close(self):

        """Close method called by BaseCamera __exit__"""

        # Close all StreamObjects

        #TODO: Figure out why this is so slow.

        for capture_list in [self.images, self.videos]:

            for stream_object in capture_list:

                stream_object.close()

    def __enter__(self):

        log("Entering context for {}.\

            Stored files will be cleaned up automatically.".format(self))

        return self

    def __exit__(self, *args):

        log("Cleaning up {}".format(self))

        self.close()

        self.stop_worker()

    # RETURNING CAPTURES