iang/arctic: Library and benchmark program for Arctic and Shine @ 781bb6e9f467144517c24c7031077e6372ec587e

Ian Goldberg 781bb6e9f4 combinecomm_noverify becomes agg to match the paper		преди 11 месеца
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bin	4a5cb38b30 gen now returns (Scalar, RistrettoPoint) to match the paper	преди 11 месеца
arctic.rs	781bb6e9f4 combinecomm_noverify becomes agg to match the paper	преди 11 месеца
lagrange.rs	752e61a8c3 We never use the Lagrange interpolate function, but we keep it for completeness	преди 11 месеца
lib.rs	cfaab14f83 cargo fmt	преди 11 месеца
shine.rs	781bb6e9f4 combinecomm_noverify becomes agg to match the paper	преди 11 месеца