Ability to define time and day length for every planet/terrain

[Peter Tigges]

Right now all terrain have the same settings afaik. Due to client conversions days on some planets pass by super fast and some much slower. We need to handle this better by adding terrain specific settings

• Local time: time from 0 to 1 (time < dayLength is day, time >= dayLength is night)
• Local day length: the day/night split from 0 to 1 (ie. 0.5 is the split between day/night)

A table with terrain specific data will follow soon