0.0.15 - The citizens now consume from all markets/stores/water towers

This is mostly a fix for something that should have been there in previous versions, but I took a shortcut back then. You may have noticed this problem if you had more than one of (each) market, hardware store, or water tower. The problem is now gone, and citizens consume resources from all the locations.

Also the town hall's gui has been simplified. In previous versions there were delayed updates, and numbers that were just too complicated to understand.
It's now much simpler:
- If all basic needs are green, then the city can grow (it will only do so though, if there's iron and stone in a hardware store; gui update to be done)
- The basic needs show a "provided/required" number, with provided being all the resources you have in markets/water towers, and required being the consumption per MINUTE (changed from a previous daily value).

Read the full changelog here and let me know what you think below!