CSharp-SDK - v1.3.1

1.3.1 February 14, 2018

Bug Fixes Change 'murmurhash' to 'murmurhash-signed' in OptimizelySDK.nuspec fixing: System.IO.FileLoadException 'Could not load file or assembly 'MurmurHash, ... PublicKeyToken ...'

https://github.com/optimizely/csharp-sdk/releases/tag/v1.3.1