- add more multi-party features (next party, etc.)
- add a few missing implementations of CPLPolyZ and CPLPolyZMod	
- Add negate functions to both CPLZ and CPLZMod
- add features to GenerateLatex
- Add a modular inverse function to CPLZMod. When the code
  "e^-k (mod p)" appears, first calculate "e^-1" using BigInteger.modInverse.
  Then take that result and raise it to the power of k. This will only work if
  p is a prime
- Fix our prime testing and generation (see rsa.cpl comments)
