A few classes allow their objects to be duplicated, so they should all
use the same interface.
Also, rename VG's dup to copy_from as it's not conforming to the
definition of dup.
Just as a starter to make a working background that, later on, will go
through Svg_Node's and build a certain source code to be saved in SVG
picture as a file
so it doesn't only load from eet or edj only
but also from those any extensions who is ACTUALLY eet, but named as,
for example, like, "file_with_svg.dev"
@fix
This is the result of a really quick review of the new VG code. Most of
it was moved around, but this merge includes the following:
- Move logic from edje to evas
- Create static lib for common VG handling
- Add file_set() API
- Add a basic VG cache in evas side
- Add savers modules, implement loaders and savers.