[Pharo-project] more fixes to svg importer

now its much better.. still there are some parts missing.. mainly those: support for elliptical arcs.. ASEllipse / #ellipticalArc: r xrot: xrot large: large sweep: sweep to: pt .. should add this type of segment to path builder. they are usually approximated either by quad or cubic bezier.. and there is a .java code for it.. just need to port it. Also some svg playing with layers/transparency groups.. to render them correctly a renderer much allocate multiple bitmap buffers to render intermediate layers separately. this is also used for masking etc and of course filters.. not implemented. and no protocol for changing the blit mode yet. -- Best regards, Igor Stasenko.