Light refactoring

Release last updated with up-to-date OpenTravel data on 2017-12-23.

Back from JodaTime

Release last updated with up-to-date OpenTravel data on 2017-11-21.

Update joda time

v1.0.2

Update joda time

Switch to Joda Time

Release last updated with up-to-date OpenTravel data on 2017-11-14.

v1.0.0

Release last updated with up-to-date OpenTravel data on 2017-08-30.