Clean up visitor API
Remove Babel
Use .es6 ext for ES6 sources
Fix depreacted getters for raw properties
Move code style properties to Node#raw
Clean up code styles
Move stringifing to separated file
Update to Babel 5.0
Lint code with ESLint
Remove outdated comments because we have API.md
Use ES6 export statement instead of module.exports
Use ES6 import
Use style system for comments
Better work with code styles with indent support
Rewrite code style detector
Convert Comment to ES6