Initial left/right line numbers.
Refactor line number calculations.
Refactor additions and deletions.
Move class methods into Line module.
MOAR Refactoring.
Extract line number calculation into a class.
Line::Base -> Line::Context.
Adding DiffFile.from_string method.
Be less ambiguous when something is a Line vs. String.
Merge pull request #1 from anolson/line_numbers

Adding line number calculation.