Add Diffie-Hellman Test to BigInteger Testcase.
Link testDiffieHellmanKeyAgreement to corresponding bug ticket.
Remove randomness from testDiffieHellmanKeyAgreement.
Merge pull request #331 from terrafrost/int64-fix

BigInteger: fix some int64 issues

* terrafrost/int64-fix:
  BigInteger: rm debug code
  BigInteger: white space change
  BigInteger: fix some int64 issues
Merge pull request #317 from bantu/BigInteger-DiffieHellman-Test

Add Diffie-Hellman Test to BigInteger Testcase.

* bantu/BigInteger-DiffieHellman-Test:
  Remove randomness from testDiffieHellmanKeyAgreement.
  Link testDiffieHellmanKeyAgreement to corresponding bug ticket.
  Add Diffie-Hellman Test to BigInteger Testcase.