Comment 3 for bug 1263242

This patch is a newer version of the preceding one. This one has the latest versions of the libuemf files.

The vast majority of these changes are to the comments, especially the doxygen comments.

Can somebody please test this on a Mac and apply it to trunk if that goes OK?

The functionality doesn't change much (just the somewhat obscure gradient type) but the documentation is much better, and it would be nice to get the Inkscape libUEMF back in sync with the libUEMF distro.