add PDF feature matrix files for comparing feature-completeness of PDF exporters

diff --git a/doc/PDF Feature Matrix.ods b/doc/PDF Feature Matrix.ods
new file mode 100644 (file)
index 0000000..363682b
Binary files /dev/null and b/doc/PDF Feature Matrix.ods differ

diff --git a/doc/PDF Feature Matrix.svg b/doc/PDF Feature Matrix.svg
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index 0000000..0136248
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