Extracting files is threaded with goroutines.
Extracting also sets the proper UID and GUID
Made recursive children getting threaded with goroutines
Decided I will allow wildcards in paths. Hasn't been implemented though.
Fixed issues with ExtendedDirectory reading (I was using a uint16 instead of a uint32)
I couldn't test basically any of this. somehow a for loop isn't incrementing. For seemingly no reason.
You can get the path that the symlink is pointing to, AND get the squashfs.File for it.
You can also now give a path FROM a given squashfs.File directory.