Move getFirstDayOfWeek to DateTimeUtils

Signed-off-by: Max Fierke <max@maxfierke.com>
Add more code documentation to DashboardController

Signed-off-by: Max Fierke <max@maxfierke.com>
Add class and function documentation to DateTimeUtils

Signed-off-by: Max Fierke <max@maxfierke.com>
Add code documentation for ClockController.

Signed-off-by: Max Fierke <max@maxfierke.com>
Update code documentation within ScheduleController and clean-up a little bit.

Signed-off-by: Max Fierke <max@maxfierke.com>
Import some classes needed for type checking.

Signed-off-by: Max Fierke <max@maxfierke.com>
Use empty instead of checking for null.

Signed-off-by: Max Fierke <max@maxfierke.com>