Villages, Roads, Deserts, Pyramids

After a longer break (I had other stuff to do), here is an update:

- I added villages consisting of multiple houses which are inhabited by NPCs. By now there is only one house type but more will be coming soon.

- There are also roads leading you to interesting places. They automatically form underground passages through mountains and bridges over canyons.

- The player can now walk uphill without jumping.

- I'm adding new zones, the first one being deserts including pyramids and oases. I also want to add tombs and ruins which you can explore as well as new enemies like undead mummies. :D

- There will be a lot of other zones like jungle, snow landscapes etc.