1.1.23

• Get rid of buggy dartdoc @category annotations.
• Fix ID lookup with SvgDOM (Issue 113)
• DOM: Export ValueColor, SvgFontSizeAbsolute (Issue 115)
• Set a color gradient's stop attributes from a stylesheet (Issue 117).
• Add a nicer toString() to SvgDOM for debugging/exploration.
• Made node paint slight more efficient; added resetPaint() method.
• Partial support for SVG text dominant-baseline attribute