A port of Stream VByte to Rust.
Stream VByte is a variable-length unsigned int encoding designed to make SIMD processing more efficient.
See https://lemire.me/blog/2017/09/27/stream-vbyte-breaking-new-speed-records-for-integer-compression/ and https://arxiv.org/pdf/1709.08990.pdf for details on the format. The reference C implementation is https://github.com/lemire/streamvbyte.
To generate the lookup tables:
cargo run --example generate_decode_table > tmp/tables.rs && mv tmp/tables.rs src/tables.rs