Merge pull request #3684 from findstar/proper-autoload

I think 'dump-autoload' command is more proper.

doc/01-basic-usage.md

@@ -213,7 +213,7 @@ You define a mapping from namespaces to directories. The `src` directory would
 be in your project root, on the same level as `vendor` directory is. An example
 filename would be `src/Foo.php` containing an `Acme\Foo` class.
 
-After adding the `autoload` field, you have to re-run `install` to re-generate
+After adding the `autoload` field, you have to re-run `dump-autoload` to re-generate
 the `vendor/autoload.php` file.
 
 Including that file will also return the autoloader instance, so you can store