Ron's TweetNaCl repo

This is a fork of TweetNaCl (pronounced "Tweet Salt") crypto library with the following modifications:

1. The code has been reformatted using clang-format

2. crypto-hash has been refactored to enable the hashing of streamed input

3. Added code to convert Ed25519 keys to Curve25519 keys to support SC4

4. Added some in-line comments based on Appendix D of the TweetNacl paper