Updated private key test to test gmp and bc math signatures, test fails when it tries to compare them
Merge pull request #115 from JoshuaEstes/TestingMathLibrariesSig

GMP and BC Math signature code generates different signatures
Revert "Merge if you like math!"
Merge pull request #116 from bitpay/revert-104-master

Revert "Merge if you like math!"