Add LZ4 support
Fix typo in header guard. Thanks, clang -Wall!
Update README for LZ4
Prefer OSXFUSE to fuse4x

fuse4x has merged into OSXFUSE, and now OSXFUSE is by far the best supported
implementation on Macs.
Clarify the terrible memory usage bug

We have fixed it for most squashfs filesystems, those that have export
tables.
Add script for autoreconf

This lets us give users a friendly message when they're missing libtool
or pkg-config, instead of a terrifying and obscure broken macro.