Add renderstat to get some info about rendering.

source/include/light.h

@@ -11,6 +11,7 @@
 
 #include <tuple.h>
 #include <colour.h>
+#include <renderstat.h>
 
 enum LightType
 {
@@ -26,7 +27,8 @@ public:
 
 public:
     Light(LightType type = POINT_LIGHT, Tuple position=Point(0, 0, 0),
-          Colour intensity=Colour(1, 1, 1)) : type(type), position(position), intensity(intensity) { };
+          Colour intensity=Colour(1, 1, 1)) : type(type), position(position), intensity(intensity)
+          { stats.addLight(); };
 
     bool operator==(const Light &b) const { return this->intensity == b.intensity &&
                                                    this->position == b.position &&