worked on 2D/3D raytracing

adjusted BVH
improved 2D/3D BVH
new bounding volumes
new test cases
renamed some test-cases for grouping reasons
made GPC header-only using slight adjustments

tests/geo/TestPoint3.cpp

@@ -0,0 +1,24 @@
+#ifdef WITH_TESTS
+
+#include "../Tests.h"
+#include "../../geo/Point3.h"
+
+TEST(Geo_Point3, math) {
+
+	Point3 p1(1,2,3);
+	p1 += Point3(2,3,4);
+	ASSERT_EQ(p1, Point3(3,5,7));
+
+	Point3 p2 = Point3(-2,-1,-4) + p1;
+	ASSERT_EQ(p2, Point3(1, 4, 3));
+
+	p2 -= Point3(1, 2, 3);
+	ASSERT_EQ(p2, Point3(0,2,0));
+
+	Point3 p3 = Point3(1,2,3)*2;
+	ASSERT_EQ(p3, Point3(2,4,6));
+
+
+}
+
+#endif