This now also includes support vor visio and cdr and also adds the
missing dependency on libexif.
Forcing -lX11 in NIX_LDFLAGS is no longer needed in 0.91, so we drop
that as well as the patch and the --with-python configure flag, which is
now no longer even valid.
Tests now seem to run fine without -j1 as well.
I also tested it against the DXF test file mentioned in #3449, to be
sure we don't regress here.
Signed-off-by: aszlig <aszlig@redmoonstudios.org>