Updated gems and gemspec.
Replaced instances of `repositext-kramdown` with `repositext`.
Patch Nokogiri::Xml::Node with convenience methods for tree processing and inspection.
Consolidated `requires` of external dependencies.
Refactored patches
Improved algorithm to merge adjacent elements in kramdown tree: recurse again when merging two elements as there may be parallel strings of mergable elements several levels down.
Folio parser: pull duplicate nested elements in folio xml tree, use new nokogiri xml node inspection methods.
Update rtfile path specs to friendlier names.
Updated Repositext::Cli::Utils.read_files to work for single and paired files.
Updated ConvertFolioTypographicalChars:

* don't convert double quotes in IALs to typographic ones
* handle more scenarios for conversion
Updated one more instance of new rtfile path format
WIP: html side by side compare tool