1.6.0
Change history:
- New options: wakeup time and go to sleep time - citizens plan their activities according to those times, not depending on sunrise/sunset (#41).
- The day and night city budgets depend on the wakeup and go-to-sleep times, not on the sun.
- The day & night time speed depends on wakeup and go-to-sleep too.
- Made Real Time compatible with the 'Use day/night cycle' option.
- Slowed down the temperature changes - now they look realistic (#23).