Neil

`examples/node/static_codegen/README.md` is not work for me. This is my solution. Run commands in `examples/node` - $ npm install grpc-tools - codegen ``` ./node_modules/grpc-tools/bin/protoc.js --js_out=import_style=commonjs,binary:./static_codegen/ --grpc_out=./static_codegen/ -I ../protos/ ../protos/helloworld.proto ```

Can it draw a Difference Chart? http://bl.ocks.org/mbostock/3894205