Finished box_example_02.
Added elm_config_scroll_bounce_enabled_get.
Added elm_config_scroll_bounce_friction_get/set.
Added elm_config_scroll_page_scroll_friction_get/set.
Added elm_config_scroll_bring_in_scroll_get/set.
Addedelm_config_scroll_zoom_friction_get/set.
Added elm_scroll_thumbscroll_enabled_get/set.
Added elm_config_scroll_thumbscroll_(momentum_)threshold_get/set.
Added elm_config_scroll_thumbscroll_friction_get/set.
Added elm_config_scroll_thumbscroll_border_fiction_get/set.
Added elm_config_scroll_thumbscroll_sensitivity_friction_get/set.