Fills some more FontAttributes based on the QFont.
Also implements initial font rotation support.

Something is still strage with the vertical font in Writers
vertical ruler. Text looks correct in vertical text boxes FWIW.

The toRectangle bug is embarrassing; I was wondering for quite
some time, which glyphs had strange size rects :-)

While at it, move the Qt5Font header to vcl/inc/qt5.

Change-Id: I67fa400486981035be6f98c5ab56e82d69c42065