Move a bunch of math to cpp files + small fixes

# Conflicts:
#	src/control/CarCtrl.cpp
#	src/math/Matrix.h
#	src/math/Vector2D.h
#	src/math/math.cpp
#	src/render/Skidmarks.cpp

src/math/Rect.h

@@ -8,18 +8,8 @@ public:
 	float right;    // x max
 	float top;      // y min
 
-	CRect(void){
-		left = 1000000.0f;
-		top = 1000000.0f;
-		right = -1000000.0f;
-		bottom = -1000000.0f;
-	}
-	CRect(float l, float t, float r, float b){
-		left = l;
-		top = t;
-		right = r;
-		bottom = b;
-	}
+	CRect(void);
+	CRect(float l, float t, float r, float b);
 	void ContainPoint(CVector const &v){
 		if(v.x < left) left = v.x;
 		if(v.x > right) right = v.x;