Add the (optional) triplet algorithm for BuildShape #10
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Use `--bs-triplet <count>` to enable it for `<count>` iterations. Instead of just intersecting the children A, B to produce an "ancestral" haplotype, also produce both differences (A-B) and (B-A). These nodes in a very rough (greedy) sense represent potential recombinations. This causes BuildShape to run slower, but can speedup MapMutations. Also switched from using murmur32 to std::hash, and the input to the hash is simplified. There is some code duplication between bf_hash.h and hap_helpers.h which I need to cleanup at some point.
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Use
--bs-triplet <count>to enable it for<count>iterations. Instead of just intersecting the children A, B to produce an "ancestral" haplotype, also produce both differences (A-B) and (B-A). These nodes in a very rough (greedy) sense represent potential recombinations. This causes BuildShape to run slower, but can speedup MapMutations.Also switched from using murmur32 to std::hash, and the input to the hash is simplified.
There is some code duplication between bf_hash.h and hap_helpers.h which I need to cleanup at some point.