New gameplay, New visual style, Map editor

Couple months of development suddendly stretched to almost a year. I do apologize for this huge delay.
Major update has been released:
- Increased level of details;
- Added new visual style, 'Nuclear Winter';
- Changed gameplay process, old version is still available in settings menu;
- Added map editor for editing building parameters such as type, height and color;
- Improved forest rendering performance;
- Optimized geodata format. Depending on territory, it can save up to 20% of disk space. This change will be applied on next geodata update.
- Reworked sound design, added soundtrack;
- Added automatically shown street names (this feature can be disabled in settings menu);
- Fixed unability to use SSAO shadows.