Added module Elm_diskselector.
Added elm_diskselector_add.
Added elm_diskselector_round_enabled_set/get.
Added elm_diskselector_side_text_max_length_get/set.
Added elm_diskselector_display_item_num_set/get.
Added elm_diskselector_clear/items_get.
Added elm_diskelector_item_append.
Added elm_diskselector_selected_item_get.
Added elm_diskselector_item_selected_set.
Added elm_diskselector_first/last_item_get.
Added elm_diskselector_item_prev/next_get.
Added elm_diskselector_item_selected_get.
Added example diskselector_example_01.