updated code to leave non-ending commas
added the unsorted output as a separate file
forgot to add file
added hand-crafted index.pdf to repo
fixed sorting bug in output_index
merging
first pass at handling xrefs
added failing test
fixed xref issue with digits in text, and new test to check for main refs assigned to page 0
ping to Sam: added failing spec for handling roman numerals in pages
fudge on roman numerals and test for escaping underscores
test passing for escaping underscores