Added vector2.

test/vector2.cpp

@@ -0,0 +1,18 @@
+#include <assert.h>
+#include <stdio.h>
+
+#include <matrix/math.hpp>
+
+using namespace matrix;
+
+template class Vector<float, 3>;
+
+int main()
+{
+    Vector2f a(1, 0);
+    Vector2f b(0, 1);
+    assert (fabs(a % b - 1.0f) < 1e-5);
+    return 0;
+}
+
+/* vim: set et fenc=utf-8 ff=unix sts=0 sw=4 ts=4 : */