Add indicator no edit time on macro docs

[kevross33]

Add in indicator for office document containing macros but no edit time seen in Bartalex created documents (i.e Dridex).

I am not convinved though on the way this ends up in text. For instance the MD5 facec082a3cffddc43e668a3080487f5 from yesterday results in a severity 3 message of "The office file has 3 macros. The file also appears to have no edit time". In today's dridex document MD5 7d3d5d9a10053587ac981f85c18d0e8a the message becomes "The office file has 3 macros. The file also appears to have no content. The file also appears to have no edit time" which sounds too much of a listing and does not read particularly well but detection wise it is fine.

[kevross33]

closing this office pull request as am creating a new one based on the new static format document (to avoid confusion)