Added a benchmark tool

Source/Problem11.cpp

@@ -75,7 +75,6 @@ std::vector<int> Problem11::grid[20] = {{ 8, 02, 22, 97, 38, 15, 00, 40, 00, 75,
 										{01, 70, 54, 71, 83, 51, 54, 69, 16, 92, 33, 48, 61, 43, 52, 01, 89, 19, 67, 48}};
 
 Problem11::Problem11() : Problem("What is the greatest product of four adjacent numbers in the same direction (up, down, left, right, or diagonally) in the 20x20 grid?"){
-
 }
 
 void Problem11::solve(){
@@ -202,3 +201,8 @@ int Problem11::getProduct() const{
 	}
 	return mee::getProduct(greatestProduct);
 }
+
+void Problem11::reset(){
+	Problem::reset();
+	greatestProduct.clear();
+}