[FIX](Protovis Text Measure) Regression in text bbox determination due to initializing the font with the font attribute, instead of the separate text-size and text-family (don't know why).
[FIX](AxisPanel) Label overflow (paddings) calculation, that always used the widest tick label to estimate overflow on either side of the axis. Now uses each and every label's bbox. This resulted in sometimes more empty space than necessary being reserved at the ends of the axis.
[FEAT](Debug Legend Panel) Added legend item labels BBox guides.