v0.12

Notable changes:

• Duplication lookup is now based on extents. This leads to a massive increase of the performances. Block-based lookup is still possible via --dedupe-options=partial.
• Following that change, a new hashfile format has been introduced. Previous hashfile format is still supported when extents lookup are disabled, this is not recommended.
• Batching has been implemented. When enabled with the -B <batchsize> option, duperemove will run the deduplication phase every <batchsize> scanned files. This is meant to help running duperemove on large dataset, with small blocksize, or on memory-constrained systems.
• All hash algorithm has been removed and replaced by xxh128. This variant is as robust as murmur3 while being faster. Choosing a hash function via the --hash option has been removed. Hashfiles built with other algorithm must be removed.