Revisions to generic.xml

Here is a first run at revising generic.xml to better handle prose and verse text.  Hopefully enough specificity has been added to the CSS rules.
The ab containing ab may be a transform bug that I haven't seen if both ab's have no types. Which file generated it?
The Tanach files do contain an overarching ab contained in the top level div, because in TEI, div cannot contain seg directly, but ab can. The ab there is just a container element with no semantic meaning, hence its having no type.