Add Pic2SVG tracing preview to vector/image tools (#460)

README.md

@@ -160,6 +160,7 @@ _Great graphics placeholders and tools to turn that squared game into a picasso
 - :free: [NormalPainter](https://winteralexander.itch.io/normalpainter) - An editor for hand painting stylized normal maps with graphical tablet and joystick support
 - :money_with_wings: [Paint.NET](http://www.getpaint.net/) - Paint.NET is free image and photo editing software for PCs that run Windows.
 - :tada: [Palette Extractor](https://pixelpixi.github.io/spritewright/palette-extractor/) - Extract the exact colour palette from any sprite or image in the browser and export it as GIMP/Aseprite .gpl, Lospec .hex, CSS, JSON or a PNG strip. Runs locally, nothing is uploaded. [Source](https://github.com/pixelpixi/spritewright)
+- :money_with_wings: [Pic2SVG](https://pic2svg.com/) - Raster-to-vector tracing preview for inspecting flat artwork intended for game icons or UI. Free anonymous split preview and enlarged view; downloads require Pro. Images are processed on the server.
 - :moneybag: [Pickle](http://www.pickleeditor.com/) - Another Pixel art Editor.
 - :tada: [PiskelApp](http://www.piskelapp.com/) - Free Online Pixel Art and Animated Sprite Tool.
 - :moneybag: [Pixelmator](http://www.pixelmator.com) - Full-featured image editing app for the Mac