message: Add .idea/
  * Add .idea/
  * Update _gitignore
  add some more.
diff: @@ -27,5 +27,21 @@ node_modules
  # Users Environment Variables
  .lock-wscript
  +# IDEs and editors (shamelessly copied from @angular/cli's .gitignore)
  +/.idea
  +.project
  +.classpath
  +.c9/
  +*.launch
  +.settings/
  +*.sublime-workspace
  +
  +# IDE - VSCode
  +.vscode/*
  +!.vscode/settings.json
  +!.vscode/tasks.json
  +!.vscode/launch.json
  +!.vscode/extensions.json
  +
  lib/
  data/
  