Occupy cities

You can occupy cities from NOW if the city of your enemy is empty! smile emoticon

But! We have two big and blocker issue about the occupy of cities:
- currently you need to reload the game because of the occupy method is not implemented on the client side yet!
- you need to move out your unit from the occupied city to access the overview of the city dialog.

We are working hard on both of issues, stay tuned! :)