Modify fix_label to account for interps
get_parent accounts for interpretation labels
Simple extension for interp ordering when adding child nodes
More thorough add_child for interps
Fixes for multiple redesignations, designations in the interpretations, and tighter restrictions on passive verbs
Interpretations skip over STARS, page markers, etc. Also separate the core of interp processing from the main function
Account for multiple, bad candidates. Reduce levels of guards
Account for interpretations of appendices
First pass at interpretation processing to notice changes
Docstrings
PEP8
Merge upstream
Account for plaintext paragraph citations
Allow interpretation headers to have a trailing period
Merge pull request #183 from cmc333333/interp-changes

First pass at interpretations processing in notice changes