The inkscape command was hardcoded, but it seems that we need the full
patch on Windows. Therefore we check in configure.py if inkscape is
installed and pass the proper name (and possibly path) to the scripts.
Should address problems mentioned in #10679
Based on Daniel Groger's work of five years ago, with minor changes
http://www.mail-archive.com/lyx-devel%40lists.lyx.org/msg169820.html
This extends the support for Xfig LaTeX + PDF to a more modern and
actively developed vector graphics editor. Embedded Objects manual
updated, also to include a workaround for an Inkscape 0.91 bug.