Improvements to Shamir Secret Sharing to verify the integrity of shares issued by a central dealer.

Chelsea H. Komlo 3746a021cc add share updates		%!s(int64=5) %!d(string=hai) anos
src	3746a021cc add share updates	%!s(int64=5) %!d(string=hai) anos
.gitignore	86643c7c22 Initial commit of empty cargo	%!s(int64=5) %!d(string=hai) anos
Cargo.toml	921ec26068 Sharing	%!s(int64=5) %!d(string=hai) anos