Implement GTest and change windows output path

Implement GTest as a testing infrastructure.
Make windows output binaries to the build folder instead of the release type folder (potentially issue further down the line)
Add a simple unit test for DestroyableComponent

tests/dCommonTests/TestNiPoint3.cpp

@@ -0,0 +1,14 @@
+#include <gtest/gtest.h>
+
+#include "NiPoint3.h"
+
+/**
+ * @brief Basic test for NiPoint3 functionality
+ *
+ */
+TEST(dCommonTests, NiPoint3Test) {
+	// Check that Unitize works
+	ASSERT_EQ(NiPoint3(3, 0, 0).Unitize(), NiPoint3::UNIT_X);
+	// Check what unitize does to a vector of length 0
+	ASSERT_EQ(NiPoint3::ZERO.Unitize(), NiPoint3::ZERO);
+}