adding ability to configure hostname/port when starting the simulator from CLI using --port=8080 --hostname=127.0.3.1
defaults != default
fixing transfer encoding of POST/PUT requests (to JSON)

The WebUI accidentally sent x-www-url-encoded, but the Hue only accepts application/json. This would have been a non-issue had the Hue SDK sent proper Content-Type request headers.
Merge pull request #6 from rodneyrehm/fix-request-payload-encoding-json

Fix request payload encoding json