Add a run script

I've taken the boilerplate for running the app and put it in a shell script.

I also think the -o wasn't a valid parameter but I may have been misunderstanding the intent.
I imagine you only want `run.sh` to log the output of `gulp watch` – you definitely don't want both combined, and I presume the former to be more useful when developing. Perhaps add `--silent` to the `http-server` command?