renaming file to match class name
Adding crypto_generichash_blake2b_salt_personal #7

Make sure libsodium version is > 0.4.5
salt personal and key
rolling back to generating random key
fixing the parameters
defining blake constants
fix GenericHashSaltPersonal method signature
fixing test method name
Implementing HashSaltPersonal

Two signatures - bytes and string. Also modifying some XML documentation
Making test pass
nunit framework not private
removing ref to Core .NET 3.5