Add CURRENT option which edje object moves from current position.

Add CURRENT option which edje object moves from current position.
Currently, when the part in edc move by transition, it moves from the
one of the states to another of the states even if it is ainimating.
We need it to move from current position, because the animation is not
natural and smooth. So I made the "CURRENT" option.

git-svn-id: http://svn.enlightenment.org/svn/e/trunk/edje@64675 7cbeb6ba-43b4-40fd-8cce-4c39aea84d33