add brief example of configuriung a plugin

[joelowrance]

For issue #5

[Alexander-Taran]

Sorry if I was not clear with my intention.
I meant this as a fix to
aurelia/framework#570

Now scratching my head how to keep your authorship and put It into core repo.. (-:

[joelowrance]

My fault. I will put this in the docs and do a PR on that repo.

[Alexander-Taran]

Thanks.. I actually thought of committing in your name (-:

[Alexander-Taran]

I thought maybe we could fork au repos to here.. but then again it would be some additional work to merge upstream

[joelowrance]

Added PR to correct repo, closing this.