remove unwanted changes
remove UTC timezone here, the Conference object will
 set the appropriate timezone in its getter that's used for serialization
Add logic to set the timezone in this getter
 so serialization includes the designated timezone
Add getters that return the time in UTC
add JsonIgnore annotations to UTC getters
 and add logic to adjust saved times when switching timezone
receive an add'l header, the offset in minutes from UTC for this client
When updating a conference, the timezone offset (from UTC) is required.
 - when saving times in the database, they are stored in UTC with a timezone offset, the timezone the user is currently in.
 - on each conference, the user saves a target timezone for the the conference.
 - when saving times, since javascript clients automatically pass the time in the timezone the user's computer is set to, the saved time is altered by the delta b/w the user's timezone and the target timezone for the conference.
 - when times are returned, they are converted to the target timezone for the conference.
   - the actual value isn't changed, it's just that it's returned as a timestamp with the timezone included.  the web client will know from this timezone how to display the time.
   - example: for any given day at 5:00 AM instead of returning MM/dd/yyyy 05:00Z, MM/dd/yyyy 01:00-04:00 is returned for EDT.
javadoc