Better signalling infrastructure from linguistic cue classifier
Fix to size classifier: normalize cit/quote/head blocks

If head tags become nested under cit/quote blocks, the sibling alignment system in the size classifier will simply isolate these blocks, rather than peering them
Override endgame escape if last reference line is simply a link
Ensure tail is None in endgame override
Fix crash in caption classifier with null text below
Handle incorrectly translated ordered list bibliographic elements
Ensure that tail of empty elements is preserved
Expand graphic caption classifier
Sibling caption classifier refinement to avoid double parsing
Croation language support