From Jeff Muizelaar <jrmuizel@nit.ca>:

        * poppler/CairoFontEngine.cc (CairoFontEngine::getFont):
        Don't print "Type 3 font!" message.

        * poppler/CairoOutputDev.cc (CairoOutputDev::drawImageMask):
        Enable image mask drawing and do it properly, albeit slowly.

        * poppler/CairoOutputDev.h
        (CairoOutputDev::interpretType3Chars): Return true so that
        Gfx.cc turns type3 characters into calls to drawImageMask