remove comp iconify hacks (and e_iconify api), expand comp object effect api

remove comp iconify hacks (and e_iconify api), expand comp object effect api

instead of adding specific handling which will work (sometimes) in one specific case, expand already-existing api to provide the needed functionality for iconify animations. now on emitting any signal to a comp object, optional glob-able effect providers can be hooked and prioritized to add effect animations

also use animating flags now when applying an object effect

a base effect is provided in elementary, but now each module which wants to hook iconify animations (or other events) can do so in the theme and have different animations with their module