Appendix processing is now a class
Account for many paren-markers. Doesn't disambiguate
No paragraph markers in appendices for now
Account for many (but not all) paragraph markers
Account for section headers with multiple sections
Merge pull request #139 from cmc333333/appendix-labels-parens

More sophisticated paragraph processing in the appendix
Also check for double section markers when encountering reserved ranges
Allow interpretation headers to apply to multiple paragraphs
Merge pull request #140 from cmc333333/reserved-range

Account for section headers with multiple sections
Modify interpretations layer to handle interps mentioning two paragraphs. Only include the interp once in the tree
Merge pull request #141 from cmc333333/missing-interp

Allow interpretation headers to apply to multiple paragraphs