[Tilesathome] less inkscape calls in _unstable

[Matthias Julius]

Knut Arne Bjørndal <bob+osm at cakebox.net> writes:

> I had a look at the code you just committed, am I reading it correctly
> in that it no longer uses ::svg2png? In that case why have you
> duplicated the function?
>
> In _rasterizer_branch I have completely reworked that part, could you
> maybe wait with your changes to just that part until that's ready, and
> I could move svg2png into Tileset.pm myself?

Well, it's commited, so the damage is done.  I won't touch RenderSVG
(which is pretty much a copy of the old svg2png) for a while until you
are done.  Sorry if I have interrupted your work.

The changes from svg2png are basically different arguments and that it
throws TilesetError instead of returning error values.

Matthias