nettle-0.1.1: safe nettle binding

# nettle-0.1.1: safe nettle binding

safe binding for the nettle (http://www.lysator.liu.se/~nisse/nettle/nettle.html) library. Tested with nettle-2.7.1, might work with 2.5, does NOT WORK with 3.0.

Modules

- Crypto
  - Nettle
    - Crypto.Nettle.CCM
    - Crypto.Nettle.Ciphers
    - Crypto.Nettle.HMAC
    - Crypto.Nettle.Hash
    - Crypto.Nettle.KeyedHash
    - Crypto.Nettle.UMAC