Chore readme examples

[jasonwilson]

Small update to readme to include example using -- flag for passing args.

Closes: #9, #22

[exogen]

nodejs-dashboard -- node -myFlag=false --bar=true index.js

I don't really get this example, is it implying both nodejs-dashboard node index.js and nodejs-dashboard -- node index.js do the same thing?

For this specific example, would this be equivalent?

nodejs-dashboard node index.js -- -myFlag=false --bar=true

I also think we should fix the -port and -eventdelay anchors in the README in this PR; should be --port and --eventdelay.

[jasonwilson]

@exogen correct, those two would be equivalent. It's just an example of how to use programs that require additional flags see: #6 (comment)

[exogen]

Gotcha. LGTM!