Suspected endianness bug

[asomers]

In src/helper.rs, get_bincode_config calls bincode::DefaultOptions::new().with_little_endian(). That works on every machine that I have access to. But since it's being used to serialize/deserialize reads and writes to /dev/fuse , I think that it will fail on a big endian machine. I think the correct endianness to use is native. See ede18ae .