Use a custom format, not ISO-8601
 - we don't want to include any timezones in what is passed to the web client.  the client simply needs a timestamp, no timezone
Add field event_timezone to conferences table
 - add it to entity, web model, service and queries
Check for new field in `ConferenceServiceTest`
 - incrememnt the version number in the test database builder too
change file name to better structure
 - adjective first, then noun.
 - drop "standard" b/c... it's kind of silly & meaningless here
Change the following fields from `DateTime` to `LocalDate`
 - conference.registrationStartTime
 - conference.registrationEndTime
 - conference.eventStartTime
 - conference.eventEndTime
 - conference.earlyRegistrationCutoff

Also upgrade to sql2o 1.1.13-ryancarlson with support for local time
Tests broken but will be resolved in next commit