setters for lastSelectedDate and completion callbacks

Signed-off-by: Ruben Mendez <ruben.mendez@gmail.com>
better reload of calendar

Signed-off-by: Ruben Mendez <ruben.mendez@gmail.com>
arrow with shadow

Signed-off-by: Ruben Mendez <ruben.mendez@gmail.com>
Merge pull request #11 from minube/features/last-selected-date

Features/last selected date