message: Fixed link to demo source
diff: @@ -66,7 +66,7 @@ This library exposes a React component, [`<QueryBuilder />`](#QueryBuilder), and
  `{id?: string, combinator: string, rules: ({field: string, value: any, operator: string} | {rules: ...[], combinator: string})[]}`
  -The initial query, in JSON form (follows the same format as the parameter passed to the `onQueryChange` callback). `id` is optional. See [the demo source](blob/master/demo/main.js) for examples.
  +The initial query, in JSON form (follows the same format as the parameter passed to the `onQueryChange` callback). `id` is optional. See [the demo source](demo/main.js) for examples.
  #### `fields` _(Required)_
  