EconomicGrounds started + AbstractInfrastructure in the plans

Using Goegraphy in a hacked style - EconomicGround base class extends Geography and uses non-identical Geographies' point heights as its own plus replaces some cube kinds with street stones - check the screenshot, you can see that non-steep parts of the EconomicGround are overridden with pavement. Now it will also override steeps with stairs later when I get there...and we are getting near to a simple street/plaza implementation that will go together well with the AbstractInfrastructure a base class for determining different population formations.