v4.4.1

Revert a change to the EMF+ page transform made in v4.4. Earlier versions used (fake) "pixel" units but v4.4 changed to "inch" as part of a general coordinate system cleanup. Turns out Office does not export to PDF properly when using "inch" units, so now reverting back to "pixel" units. Also fix sign error in glyph descent when using AFM font metrics.