A* implementation

Working except for end of path endless loop (0,0 point appearing in paths for no reason?)

Commit mainly because the HDD is on the verge of dying

src/Entity.h

@@ -34,6 +34,7 @@ enum class Orientation
     East = 90,
     South = 180,
     West = 270,
+    None,
 };
 
 
@@ -47,13 +48,15 @@ public:
     void move(Orientation orientation);
     void update();
 
-    const sf::RectangleShape& getShape() const;
     const State getState() const;
+
+    const sf::RectangleShape& getShape() const;
+    /// Returns the grid coordinates at the center of the entity
     const pro_maat::GridPos getPosition() const;
+
     // Don't like it : iterates over every square every tick
     const std::vector<pro_maat::GridPos> getOccupiedSquares() const;
 
-
     /// Position of the target of the current action on the map
     pro_maat::GridPos target;
 private:
@@ -62,6 +65,7 @@ private:
     EntityType type;
 
     // As it contains position, size and orientation, we do not need anything more
+    // TODO : Maybe we need something more : lots of computations
     sf::RectangleShape shape;
 
     State currentState;