Ratarmount

- Fix broken CLI and add test for it.

- Fix bug with filename encoding on some special characters like accented vowels or umlauts.
- Add support to mount simple .gz or .bz2 files, which are not compressed TARs.
- Fix number of hardlinks being always shown as 2. Changed to show 1.
- Fix wrong size reporting when index size has changed.
- Fix blocksize and therefore `du` results always showing 0.
- Add command line option to turn on modification timestamp checking.
- Add command to mount recursive tars at folders where the .tar extension is stripped.
- Fix recursion limit hit when mounting a TAR with more than or equal 1000 contained TARs.

- Add support for sparse files inside the TAR.
- Automatically detect if the TAR file has grown since the last index creation.
- Add support for truncated TAR files, e.g., during downloading.
- Add support for concatenated TAR files.
- Add support for hardlinks in the TAR file.
- Add support for union mounting.
- Add support for accessing older versions of a file if the TAR containts multiple versions.
- Detect changes in TAR files and recreate the index if so.
- Remove support for old non-SQLite index backends.

- Add option for gzip index seek point spacing to CLI.
- Fix absolute symbolic links being stripped of their leading '/'.
- Fix returned error codes.
- Fix detection and recreation of found incomplete indexes.
- Add -o alternative short version for --fuse.

- Make bzip2 seek support standalone module.
- Fix memory leak because BZ2Reader destructor was never called.
- Fix SQLite backend loading not working when index is read-only.
- Improve faulty index detection.
- Fix typo causing bug with gzip support detection.
- Deprecate legacy serializers.

- Fix performance bug for index creation of uncompressed TARs by not
using streaming mode in that case.