Add Alignment class
Extract Helpers::Parsing from Treebank::Parser
More code movement
Add class hierarchy for Alignment
Rephrase Treebank::Parser spec
Add alignment parser spec
Comment some premature lines in Alignment
Add id to Alignment sentence spec
Fix Alignment::Parser spec
Add Ox Parser for Alignments
Capture languages in Alignment::Sentence
Extract a Nokogiri specific parsing helper module
Fix minor error in refactored NokogiriHandler
Move code from OxHandler to Helper for Alignments
Add Alignment::Parser::NokogiriHandler
Remove accidentially commited profiling data
Add some temporary hook methods in Alignment
Remove already fixed TODO in Comparison
Make Treebank#root_identifier private
Introduce new module Diff::Common