added a link to the CLI documentation

README.MD

@@ -8,6 +8,7 @@ SingleFile is a WebExtension compatible with Chrome, Firefox (Desktop and Mobile
  - [Additional notes](#additional-notes)
  - [More info](#more-info)
  - [Statistics (Firefox)](#statistics-firefox)
+ - [Command Line Interface](#command-line-interface)
  - [Known issues](#known-issues)
  - [Troubleshooting unknown issues](#troubleshooting-unknown-issues)
  - [Contributors](#contributors)
@@ -52,6 +53,9 @@ See the extension help in the options page for more detailed information about t
 ## Statistics (Firefox)
 See https://addons.mozilla.org/en-US/firefox/addon/single-file/statistics/?last=90
 
+## Command Line Interface
+See https://github.com/gildas-lormeau/SingleFile/blob/master/cli/README.MD
+
 ## Known Issues
 - All browsers:
   - For security reasons, you cannot save pages hosted on https://chrome.google.com or https://addons.mozilla.org.