Add examples for streaming situations

[codedread]

Specifically, I'm looking for how to properly close a streaming RPC with an error code/status in a Node server.

See https://github.com/grpc/grpc-node/issues/287

[avinassh]

Hey. Error handling in streaming would be same as non streaming RPC calls

[long1eu]

@avinassh how exactly? you can't just call.write() since it's typed and it will throw if you try to send anything else except the proper message.

[long1eu]

found it, but it's absolutely not the same as with unary

https://github.com/grpc/grpc-node/issues/287#issuecomment-383218225

call.emit('error', status)

[avinassh]

Thanks for educating me @long1eu, I assumed it would be same since it is same across all languages.

[long1eu]

Thank you for your work.