Adding code

include/J3ML/LinearAlgebra/Matrix2x2.h

@@ -0,0 +1,18 @@
+#pragma once
+
+#include <J3ML/LinearAlgebra/Vector2.h>
+
+namespace LinearAlgebra {
+    class Matrix2x2 {
+    public:
+        static const Matrix2x2 Zero;
+        static const Matrix2x2 Identity;
+        static const Matrix2x2 NaN;
+
+        Vector2 GetRow() const;
+        Vector2 GetColumn() const;
+
+    protected:
+        float elems[2][2];
+    };
+}