small clean up

Signed-off-by: Yakov Goldberg <yakov.g@samsung.com>
add include for elm_widget and elm_container

Signed-off-by: Yakov Goldberg <yakov.g@samsung.com>
add eo_unref, right after object creation

Signed-off-by: Yakov Goldberg <yakov.g@samsung.com>
convert example to eo_callbacks

Signed-off-by: Yakov Goldberg <yakov.g@samsung.com>
temp
add callback generation

Signed-off-by: Yakov Goldberg <yakov.g@samsung.com>