Initial.
Include the extent structure, to get more info about file extents.

Needs a very recent cffi: a7550e27bbc4 helps dealing with packed structures.
Check generations more closely and print more debug info.
Print the file basename.
Prettify the source.
Log all inodes, not just those with file data.
Catch-up commit.
Split into the main entry point and a btrfs module.
Make find_new more library friendly
Add a quick README
README: mention CFFI.
Explain the generation argument.
WIP on tracking large files for deduplication.
A better way of finding paths for an inode.
Get fsid
Track filesystem id in the state database.
Fix a pointer being gc-ed too early.
Track last scanned generation for incremental updates.
Move ioctl structs to the ioctl.h section.
Remove unused ino_resolve