Use source-map.
Return source maps.
Improve source map generation.
Comments.
Formatting.
Return statements.
Functions.
Implement the scope resolution operator.
Formatting, and add a parentheses test.
Rename the assignments test.
Remove transform.
Update Walker API to be clearer.
Update Walker API to use onUnknownNode().
Refactor into helpers.
Use CoffeeScript for tests.
Add parse tests.
Add helper tests.