Added install instructions

Author: larkov

README.md

@@ -8,4 +8,9 @@ Deskop with icons.
 ![With icons](img/with-icons.png)
 
 Desktop without icons.  
-![Without icons](img/without-icons.png)
+![Without icons](img/without-icons.png)
+
+## Instalation
+Download the latest release from the [Releases page](https://github.com/larkov/ToggleDesktopIcons-AlfredWorkflow/releases) and click on the downloaded file and Alfred should take care of it.
+
+If the icons reappear after the first toggle just run it once more.