definitions for BigInt by Baird Leemon.
distribution source: https://github.com/Evgenus/BigInt
original source: http://www.leemon.com/crypto/BigInt.html
definitions for Stanford Javascript Crypto Library
Merge pull request #2611 from Evgenus/bigint

definitions for BigInt by Baird Leemon.
Merge pull request #2612 from Evgenus/sjcl

definitions for Stanford Javascript Crypto Library