message: exclude demo folders from npm
diff: -# Node generated files
  -demo
  -node_modules
  -npm-debug.log
  # OS generated files
  Thumbs.db
  .DS_Store
  +# Node generated files
  +npm-debug.log
  +node_modules
  coverage
  docs
  +demo
  +demo-html
  +demo-node
  \ No newline at end of file
  