bcgit/bc-csharp — pull request #6 by timw (2013-10-10 06:59:37+00:00)
Title: Port Salsa20, XSalsa20 and ChaCha changes from bc-java

Port from bc-java:
- reduced round Salsa20
- registerised Salsa20 core
- XSalsa20 implementation
- ChaCha implementation

protected uint signatures required CLSCompliantAttribute(false) to suppress warnings -- I'm not sure whether CLS compliance is a goal of bc-csharp, so let me know if this isn't OK.