Repair defective CTS hierarchies

[fbaumgardt]

This mostly involves moving CTS sub-hierarchies into their parent elements in the TEI to recover non-degenerated XML trees. This way an Xpath query will yield the full subtree.

This happens in parallel to #1 and fbaumgardt/perseus-citology#3.

[fbaumgardt]

This should mostly be adding empty divs with sub-references into the parent (node) elements, and updating the children's filenames.

[fbaumgardt]

The most complex issue is actually identifying citationMappings, because they appear to be missing altogether.

@simonastoyanova - is there a list of sensible rules to build hierarchies from a flat list of textpart-elements, or a set of written-down rules from which to construct that list? I want to be able to run through an ordered list of elements and be able to decide whether I should add an element as a child to the previous element.

[fbaumgardt]

I am considering whether this should be outsourced into a d3.js app based on the dendrogram:

• div-elements as expandable nodes
• other nodes are static
• drag-and-drop to re-arrange the XML tree
• hover to display node contents in an overlay frame
• right-click (or alt-click) to edit attributes