Mostly pulled out all of the ftxui rendering into cleaner areas.

entity.hpp

@@ -13,12 +13,15 @@ enum class EntityEvent {
 
 class Entity : public DeadSimpleFSM<EntityState, EntityEvent> {
 public:
-  Point location;
+  Point location{0,0};
   int hp = 20;
   int damage = 10;
 
+  Entity() {
+  }
+
   Entity(Point loc) : location(loc) {
-  };
+  }
 
   // disable copy
   Entity(Entity &e) = delete;