Added Visual Studio 2017 as a development paltform to README.md.
Added Visual Studio 2017 as a development paltform to README.md.

Azure-Samples/media-services-dotnet-functions-integration,shigeyf/media-services-dotnet-functions-integration,shigeyf/media-services-dotnet-functions-integration,Azure-Samples/media-services-dotnet-functions-integration