Patching again

• Fixed some more coverity issues (@ajs124)
• Removed the obsolete zpios module (@lnicola)
• Fixed some crashes and added some more checks
• Fixed zfs_ignorecache
• Fixed shutdown hook
• Generated units are more beautiful now

Patchy release

All double-frees, missing frees, and other potential problems are (hopefully) solved now.

@ajs124 helped a lot with this.

Entire rewrite

This is a rewrite of the package.
We now use systemd generators.

Initial release

v0.1.0

Initial commit of the sd-zfs project