[Inkscape-devel] another change in defaults

With all the recent improvements, the Calligraphic tool is becoming much more than just a calligraphic tool - it's now more of a general purpose paint tool. So I changed this tool to use the last set style by default, instead of the fixed black. This means that in a newly installed copy of Inkscape it will paint black, but as soon as you change the fill of anything it will use that new color. I think it makes it more usable for newbies.