Feature: Consume package.json:config just like npm

[ryan-roemer]

And with multiple levels of overrides going down to root project.

See:

• https://docs.npmjs.com/files/package.json#config
• https://docs.npmjs.com/misc/config#per-package-config-settings

Strawman:

// <root>/package.json
  "config": {
    "electrode_archetype_react_component_webpack_style_modules": true
  },

// <archetype>/config/webpack/webpack.config.js
var moduleStr = !!process.env.npm_package_config_electrode_archetype_react_component_webpack_style_modules;

console.log(
  process.env.npm_package_config_electrode_archetype_react_component_webpack_style_modules,
  moduleStr,
  typeof moduleStr);