Add NUnit project file
Make NUnit version agnostic

This may break for drastically different versions of NUnit, but it's the
only way I could get it working on my machine, without just setting it
to another version number that will break it for other people. This
works fine in VS, does it work for mono?
Merge remote-tracking branch 'origin/master'
Merge branch 'master' of https://github.com/adamcaudill/libsodium-net
added a call to crypto_sign_seed_keypair in order to deterministically generate key pairs
Merge pull request #6 from jestin/master

added GenerateKeyPair with seed parameter