Convert globals in now-racing.js to local object properties.  Add watchdog to restart in case of query failure.
Convert globals in now-racing.js to local object properties.  Add watchdog to
restart in case of query failure.

jeffpiazza/derbynet,jeffpiazza/derbynet,jeffpiazza/derbynet,jeffpiazza/derbynet,jeffpiazza/derbynet,jeffpiazza/derbynet,jeffpiazza/derbynet