SVG graphics for VSTGUI

Simple class overloading CBitmap and utilizing SVG graphics for drawing.

Parsing with nanosvg.

Drawing inspired by Surge.

"Usage"

using namespace VSTGUI;
...

CRect svgSize(x1, y1, x2, y2);
std::string svgPath = "C:\\wherever\\myImage.svg";
auto myImg1 = SVGGraphics(svgSize, svgPath);

auto myView = new CView(svgSize);
myView->setBackground(myImg1);
addView(myView);

...

CRect btnSize(x1, y1, x2, y2);  //make it 0.5* height, so on/off background is switched correctly
CKickButton *btn = new CKickButton(btnSize, listener, tag, new AFDSVGGraphics(btnSize, resourceID));
addView(btn);

...