Fix CLI arguments passing (close #83)

Fixes mishandled process.argv when passed from Configuration to ArgumentParser. Instead of passing argv to parse() it should be passed in to ArgumentParser() per argument_parser_spec.js.
Release 0.2.19
Add JSON formatter (close #79)
Update development status in README
Add contributor
Move release checklist from README to CONTRIBUTE
Force example feature execution order in JSON feature
Fix data table and tags handling in JSON formatter
Release 0.2.20
Add bundler

The bundler packages Cucumber.js to be used in web browsers.
Release 0.2.21
Print data tables in pretty formatter output (close #89)
Remove duplicate method definition
Print doc strings in pretty formatter output (close #81)
Exclude unmatched features from AST (close #80)

This improves the way features are selected for inclusion in the AST. This fixes the issue where unmatched feature headers were output by the formatters.
Update README
Release 0.2.22
Build on Node.js 0.8 on Travis
Rewrite README's status table in HTML

Most Markdown interpreters (like NPM's) don't understand Github's markdown tables. Use plain HTML instead.
Bump Gherkin (close #78)