Add README.md to Freeciv directory.
Add README.md to Freeciv directory.

andreasrosdal/freeciv-web,tltneon/freeciv-web,tltneon/freeciv-web,andreasrosdal/freeciv-web,adaxi/freeciv-web,adaxi/freeciv-web,tltneon/freeciv-web,andreasrosdal/freeciv-web,tltneon/freeciv-web,andreasrosdal/freeciv-web,tltneon/freeciv-web,andreasrosdal/freeciv-web,adaxi/freeciv-web,adaxi/freeciv-web,tltneon/freeciv-web,adaxi/freeciv-web