Naru: Combining the economy engine with the map

The latest installment of Naru (an island economy game) joins the economy simulation and the island maps.  Now when you create an island, it will have the economy engine I wrote about earlier running behind the scenes.  This means that cities can trade with each other if you connect them with roads. By clicking on the city names, you can control the production levels of the cities and see graphs of population trends in the city.

I also improved a few issues in the UI. The squares of the map are now shaded slightly, making it easier to click the square you intended to. Also, cities will automatically connect to roads now; you don’t have to build both a city and a road on the same square.