Added a benchmark tool

Source/Problem19.cpp

@@ -44,7 +44,6 @@ unsigned int Problem19::START_YEAR = 1901;	//The start year
 unsigned int Problem19::END_YEAR = 2000;	//The stop year
 
 Problem19::Problem19() : Problem("How many Sundays fell on the first of the month during the twentieth century (1 Jan 1901 to 31 Dec 2000)?"), totalSundays(0){
-
 }
 
 Problem19::DAYS Problem19::getDay(unsigned int month, unsigned int day, unsigned int year){
@@ -189,3 +188,8 @@ uint64_t Problem19::getTotalSundays() const{
 	}
 	return totalSundays;
 }
+
+void Problem19::reset(){
+	Problem::reset();
+	totalSundays = 0;
+}