Comment 4 for bug 171930

Ok, I start to see some usefulness to this. Options could be:
* Number of nodes/objects/layers.
* Text statisctics (word/letter count).
* Images used and link status.
* Embedded scripts (already there in Doc Properties).
* Color spaces/profiles used in the document (already there in Doc Properties).
* Color swatches used.
* Inks used (process+Spot, when we get that).
* Metadata.
* File size, dates... as already described in this report.
* Fonts used, with data about embedding status (SVGFonts).
* What else?

This could be parallel developed as a shell integrated tab for native file properties dialog on Windows OS ;)