Inkscape requires absolute paths for texmath files
Inkscape requires absolute paths for texmath files

  - A clean install of softcover 1.1.27 was failing to generate pngs from svgs under Mac OS 10.10
  - Traced it to InkScape call for .svg --> .png conversion
  - Apparently new X11 setup on mac requires absolute paths https://bugs.launchpad.net/inkscape/+bug/1449251
  - This changeset uses abspaths when calling InkScape: the rest of file and logic unchanged (i.e. hrefs still use relative paths)

minireference/softcover,softcover/softcover,softcover/softcover,softcover/softcover,minireference/softcover,minireference/softcover