- Upgrade d3 to version 4
- Use external d3-textwrap library
    - Problem is it's for d3 v4 only
- Make node console output colors like Chrome console
- What's the correct way to change logLevel as an end user?
- d3 v3 doesn't support 'use strict'
    - babel-plugin-transform-remove-strict-mode
        - need to remove it after upgrading to d3 v4
- Fix CodeClimate
- What is live-server ?
- Get familar with jison
- webpack warning: lodash too big
- add coveralls
- git graph requires a blank line at the end. why?