FUSE: Write-back dirty page cache

Performance optimizations

- Drop Mmap for backend store reading. Reading from memory-mapped files
  causes lots of small IOs.
- Drop jemalloc. In 2021 the standard allocator is quite decent.
- Write back to the restore device with only a single thread. We expect
  the underlying file system to process open write requests
  concurrently.

1.0.0

Stable release! :-) Improved cache handling, many bugfixes.

0.3.2

Fix FUSE read errors

Documentation improvements

0.3.1

Update dependencies

FUSE driver

0.3.0

Release 0.3.0

Initial release

0.2.0

Release 0.2.0