ReadMe: Add description for svg2png (#62)

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@ -149,8 +149,31 @@ Lastly, terminate the engine after usage.
tvg::Initializer::term(tvg::CanvasEngine::Sw);
```
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## SVG to PNG
If you want to preview ThorVG renderer's SVG output, you can use `svg2png` converter which can be used to convert SVG file to PNG file.
To build `svg2png`, you need to change the build option.
```
meson -Dutility=svg2png . build
```
Or you can add `svg2png` value to `utility` option in `meson_option.txt`. Build output is located in `builddir/src/bin/svg2png/`
`svg2png` creates `FILENAME.svg.png` by entering path of svg file, resolution, and background color.
```
Usage:
svg2png [svgFileName] [Resolution] [bgColor]
Examples:
$ svg2png input.svg
$ svg2png input.svg 200x200
$ svg2png input.svg 200x200 ff00ff
```
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## API Bindings
Our main development APIs are written in C++ but ThorVG also provides API bindings such as: C.
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