Adding tests for AddHours, AddMinutes, AddSeconds, AddMilliseconds.
Adding tests for AddHours, AddMinutes, AddSeconds, AddMilliseconds.

wsick/Fayde,Ronmenator/Fayde,Ronmenator/Fayde,wsick/Fayde,Ronmenator/Fayde,wsick/Fayde,Ronmenator/Fayde,wsick/Fayde