Added module Elm_calendar.
Added elm_calendar_add.
Added elm_calendar_weekdays_names_get/set.
Added elm_calendar_min_max_year_set/get.
Added elm_calendar_select_mode_set/get.
Added elm_calendar_selected_time_set/get.
Added elm_calendar_mark(s)_add/del/clear.
Added elm_calendar_marks_get/draw.
Added elm_calendar_interval_set/get.
Added elm_calendar_first_of_week_set/get.
Added elm_calendar_selectable_set/get.
Added elm_calendar_displayed_time_get.
Added example calendar_example_01.