Time zones for fugit and rufus-scheduler

 EtOrbi::EoTime instances quack like Ruby Time instances, but their #zone
 returns a TZInfo::TimeZone instance.
 .
 If Rails is present, Time.zone is provided and EtOrbi will use it, unless
 ENV['TZ'] is set to a valid timezone name. Setting ENV['TZ'] to nil can
 give back precedence to Time.zone.
 .
 Rails sets its timezone under config/application.rb.