Pocket City: Città in tasca

Jan 24, 2019

- Add "Building Supply Co." store, reduces upkeep of nearby zones
- Add View for selectively showing one type of building at a time

Balance:
- Reduce # of fire stations needed on hard/expert mode (for new cities)
- Balanced upkeep for zones of all sizes, .e.g. four 1x1 buildings is the same as one 2x2 building (for new cities)

Fixes:
- Fix occasional wrong power overload warning
- Fix incorrect food export (for new cities)
- Fix bug where certain railway sections aren't rebuilt after disaster