iang/arctic: Library and benchmark program for Arctic and Shine @ 41a06655fb4bab08ac5ce14d98cca4e3e2297a74

Library and benchmark program for Arctic and Shine

Ian Goldberg 41a06655fb Make sign2 match the paper		10 月之前
src	41a06655fb Make sign2 match the paper	10 月之前
Cargo.toml	55187fb080 Use itertools::combinations instead of rolling our own	10 月之前