Tooling has improved to be more UX friendly.

New features:

• fuse, tool: create & load multi-image filesystems
• fuse, tool: a key file can be saved & provided to skip key derivation
• tool: argon2id parameters are configurable
• tool: dump shows more filesystem-wide info
• fuse: implement statfs
• fuse: add option to control cache size

Fixes:

• fuse: use rwx-r-xr-x permissions as default
• nros: fix block count mismatch between chains