📝 adding some basic usage configuration

Author: carbontwelve

README.md

@@ -19,3 +19,13 @@ Next add the package service provider to your providers configuration in Laravel
 ```
 
 Now you can assign the middleware `remember.files` to routes that you want the packages functionality to operate on.
+
+## Usage
+
+To ensure that remembered files remain as such accross page refreshes (due to other validation errors) you need to include a reference by way of using a hidden input field with the name `_rememberedFiles`.
+
+```
+@if( $oldFile = oldFile('file'))
+    <input type="hidden" name="_rememberedFiles[file]" value="{{ $oldFile->getFilename() }}">
+@endif
+```