Added logging of config rendering options on save/load of the config.
Replaced with intuitive .toString methods and external loggers
Added "Preview Map" window

* Updates accordings to world seed
* Still uses old UI, because NUI is not yet finished
* Shows Humidity, Temperature and Biomes
* Zoom Slider does not work properly - UI bug?
Prettify code for CheckStyle
Fixed double logging of rendering debug settings.
Merge #759 from @msteiger - Map Preview