Docs: LiveReload option

docs/_docs/usage.md

@@ -65,15 +65,17 @@ jekyll serve
 # => A development server will run at http://localhost:4000/
 # Auto-regeneration: enabled. Use `--no-watch` to disable.
 
+jekyll serve --livreload
+# LiveReload refreshes your browser after a change.
+
+jekyll serve --incremental
+# Incremental will perform a partial build in order to reduce regeneration time.
+
 jekyll serve --detach
 # => Same as `jekyll serve` but will detach from the current terminal.
 #    If you need to kill the server, you can `kill -9 1234` where "1234" is the PID.
 #    If you cannot find the PID, then do, `ps aux | grep jekyll` and kill the instance.
 ```
-<div class="note tip">
-  <h5>Livereload</h5>
-  <p>If you want to enable Livereload, you can enable the <a href="https://github.com/RobertDeRose/jekyll-livereload">jekyll-livereload</a> plugin in a <a href="../configuration/#build-command-options">development config file</a>.</p>
-</div>
 
 ```sh
 jekyll serve --no-watch