Added to strings method to Flight and Duration Bean.
Added Comparator function to order and calculate max and min value with thenComparing. Example: .min(byNumPassengers.thenComparing(byNumSeats)); flightCollection.stream().sorted(
				byNumPassengers.thenComparing(byNumSeats));
Added Reduce a flight collection. Reduce operation create an "sum iterate operation for each element". We will calculate sum of all flights using Duration class
Merge branch 'master' of https://github.com/cristianprofile/testing-java1.8-features