Support of animated SVG features keySplines, keyTimes, and begin, dur, end, min, max attributes

[Popolon]

Currently Scour doesn't support keySplines, keyTimes, begin, dur, end, min, max attributes used in anmated SVG, so their valus are not truncated.

See this example, made with Glaxnimate (can be played as is in most browser). Also it looks like Scour doesn't truncate under 3 decimal of precision with --set-precision= option.

<animateTransform attributeName="transform" begin="0.000000" calcMode="spline" dur="3.000000" keySplines="0 0 1 1; 0.000000 0.000000 0.800587 0.048913; 0.000000 0.000000 1.000000 1.000000" keyTimes="0; 0.011111; 0.094444; 1" repeatCount="indefinite" type="translate" values="303.797 288.622; 303.797 288.622; 243.038 380.977; 243.038 380.977"/>