DOCX filter: fix <w:em> handling

The real news here is that "comma" and "dot" was swapped on export, the
rest is just a fixup of recent breakage.

Change-Id: I54045f5837652dc38a30361e21ced25aeaf58257
RTF filter: fix \acc* handling

The exporter didn't write circle and underdot at all.

Change-Id: Ia8f45f2b03fb14e9a0027ec24ee7f36adc8c018d
Clean up now unnecessary boost::bind() magic in RTFSdrImport::initShape()

Change-Id: Ie373098959f8b3e04fe955a08031a4221faab3cc
Remove dead code

Only doctok produced these tokens, so no need to handle them anymore.

Change-Id: Ied7df2515ac86562dd5ce782a1f01158fe3f684e