ckomlo/VerifiableSecretSharing: Improvements to Shamir Secret Sharing to verify the integrity of shares issued by a central dealer. @ fed045bbe55eb9835b0c0353e028967a085cb98b

Chelsea H. Komlo fed045bbe5 add verifying commitment		%!s(int64=5) %!d(string=hai) anos
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lib.rs	a617445040 Tests for the two functions we implemented so far	%!s(int64=5) %!d(string=hai) anos
vss.rs	fed045bbe5 add verifying commitment	%!s(int64=5) %!d(string=hai) anos