Added a .gitignore file to make life simpler
Added a .gitignore file to make life simpler

happydpc/protobuf-csharp-port,evgenekov/protobuf-csharp-port,evgenekov/protobuf-csharp-port,plutoo/protobuf-csharp-port,happydpc/protobuf-csharp-port,happydpc/protobuf-csharp-port,evgenekov/protobuf-csharp-port,evgenekov/protobuf-csharp-port,plutoo/protobuf-csharp-port,plutoo/protobuf-csharp-port,plutoo/protobuf-csharp-port,happydpc/protobuf-csharp-port