Visual transition, SVG/AGIF added

Visual transition, SVG/AGIF added

- Transition(Animation) example added, SVG/AGIF Visual example added. (visual-animation-test.cs)
- AnimatorVisual, SVGVisual, AnimatedImageVisaul(AGIF) high level classes added.
- Visaul high level class naming changed (remove "Map" suffix)
- UpdateVisual() added. (by only changing high level visual class's property, visual is updated automatically)
- property naming change : Offset => Position, VisualSize => Size

Change-Id: I978b820ed1dc5dadc54d1ed9872f4182f022bd2f
Signed-off-by: dongsug.song <dongsug.song@samsung.com>