Library and benchmark program for Arctic and Shine

Ian Goldberg 6b436ac7c0 Use references, not copies, in the inner loop of gen 9 kuukautta sitten
src 6b436ac7c0 Use references, not copies, in the inner loop of gen 9 kuukautta sitten
Cargo.toml 55187fb080 Use itertools::combinations instead of rolling our own 9 kuukautta sitten