Added lexer tests

examples/LawsOfMath.lx

@@ -0,0 +1,19 @@
+int add(int a, int b)
+{
+	return a + b
+}
+
+int main(void)
+{
+	int c = add(3, 4)
+	if (c == 7)
+	{
+		return 0
+	}
+
+	# The laws of maths have been broken #
+	else
+	{
+		return 1
+	}
+}