Environ effect lookup table/dict refactor

Replace this mess: https://github.com/OpenPerpetuum/PerpetuumServer/blob/Development/src/Perpetuum/Services/EventServices/EventProcessors/EnvironmentalEffectHandler.cs#L62-L102
With a dictionary keyed on time/weather info object pairs, or something, just not that awful mess linked above.