Changed time zone recommendation to Eastern

UTC is a programmer’s time zone, while local allows for easier reasoning about time of day. In Oakland Crimespotting, we used exclusively local timestamps for all events to ensure that users of the data could easily imagine the circumstances of a report: morning vs. afternoon, night or day. Since time zones are recommended, make them local to Chattanooga.
Merge pull request #3 from migurski/patch-1

Change time zone recommendation to Eastern