Update the chrono if Weekend or Absent.
Updated implemented functions in the changelog.
Absent days are registered.
Day class holds the info of the current day in the TimeManager instance.
Added a TODO: Get the values from the eventgroups in the saveEventsInTempFile().

Use the extended for of longToString.
Created a new longToString method that uses a boolean to use Hundreds in the hours.
Empty time changed to two zeros in the hour.
Print the minutes in each day using leading zero.
Remove unused commented code.
Define groupTime and getter.
Remove unused code in saveEventsInTempFile.

Use the groups to get the time.