Make cairo devices honor the -eofill option.
Make cairo devices honor the -eofill option.

Implemented and tested (using example 27) for xcairo, pdfcairo,
pscairo, svgcairo, and raster devices (e.g., pngcairo and jpgcairo).

Implemented for memcairo, extcairo, and wincairo.

N.B. those latter devices need testing with fills for
self-intersecting boundaries. 


svn path=/trunk/; revision=11588

FreeScienceCommunity/PLPlot,FreeScienceCommunity/PLPlot,FreeScienceCommunity/PLPlot,FreeScienceCommunity/PLPlot,FreeScienceCommunity/PLPlot,FreeScienceCommunity/PLPlot,FreeScienceCommunity/PLPlot,FreeScienceCommunity/PLPlot,FreeScienceCommunity/PLPlot