message: Document how to use the Sauce plugin
diff: @@ -214,11 +214,27 @@ Note that by specifying a plugin's configuration, you are letting WCT know that
  it should load that plugin. If you wish to provide default configuration for a
  plugin, but not enable it, you can have it default to disabled:
  +Requesting that plugin via `--plugin` on the command line (or overriding the
  +plugin's configuration to `disabled: false`) will cause the plugin to kick in.
  +
  +### Sauce
  +
  +The **sauce** plugin runs your tests on [Sauce](https://saucelabs.com/).
  +
  +To use the sauce plugin you need to include credentials. To do this, either
  +set the `SAUCE_USERNAME` and `SAUCE_ACCESS_KEY` environment variables, or
  +set the `username` and `accessKey` fields in the `plugins.sauce` section of
  +your `wct.conf.json`.
  +
  +You can configure the browsers that Sauce will run by setting the `browsers`
  +array in the plugin configuration. The options are the same as the ones documented
  +on the Sauce Wiki [here](https://wiki.saucelabs.com/display/DOCS/Test+Configuration+Options#TestConfigurationOptions-RequiredSeleniumTestConfigurationSettings).
  +For example:
  +
  ```js
  {
  "plugins": {
  "sauce": {
  - "disabled": true,
  "browsers": [{
  "browserName": "microsoftedge",
  "platform": "Windows 10",
  @@ -239,11 +255,6 @@ plugin, but not enable it, you can have it default to disabled:
  }
  ```
  -For more information on Sauce configuration, [see their Wiki](https://wiki.saucelabs.com/display/DOCS/Test+Configuration+Options#TestConfigurationOptions-RequiredSeleniumTestConfigurationSettings)
  -
  -Requesting that plugin via `--plugin` on the command line (or overriding the
  -plugin's configuration to `disabled: false`) will cause the plugin to kick in.
  -
  ## Variant dependencies
  Sometimes you want to run your project's tests against different versions of
  