NeuInk 0.4.2

Fixes a font size bug inherited from upstream CrossInk.

With embedded styles on, text a book sets to 0.85em or 0.9em was scaled down again and then rounded down to a whole point, so the page read two or three sizes under the one picked (15 pt showed as 12 pt). Book scales from 0.84 to 1.1 now keep the picked size, and smaller or larger text rounds to the nearest size instead of down. Headings and footnotes still scale. The reader menu's preview still draws everything in one size.