Add generate_library script for Windows
Add generate_library script for Windows

Assumes python is on %PATH%.

chrisdunelm/google-api-dotnet-client,googleapis/google-api-dotnet-client,jskeet/google-api-dotnet-client,Duikmeester/google-api-dotnet-client,googleapis/google-api-dotnet-client,ivannaranjo/google-api-dotnet-client,Duikmeester/google-api-dotnet-client,chrisdunelm/google-api-dotnet-client,ivannaranjo/google-api-dotnet-client,chrisdunelm/google-api-dotnet-client,chrisdunelm/google-api-dotnet-client,jskeet/google-api-dotnet-client,ivannaranjo/google-api-dotnet-client,jskeet/google-api-dotnet-client,Duikmeester/google-api-dotnet-client,ivannaranjo/google-api-dotnet-client,googleapis/google-api-dotnet-client,Duikmeester/google-api-dotnet-client