Okay, I have pushed changes to implement Nos. 1 (? QWhatsThis), 4 (prettifying empty xhtml files), and 6 (extended support for other. type Guide semantics).
For 6, I have extended the list of recognized guide items to include many of the other.* codes that directly map to epub3. These codes will be recognized by the ncxgenerator.py code as well, as well as epub3-itizer.
I will look into how the h* icon size is determined, as well. The case change icon is simply a text string which we could replace if someone would design a better icon for us! ;-)
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