Usage conditions in README (#25)

* Add usage conditions

* Add usage conditions

Author: renebigot

README.md

@@ -22,6 +22,11 @@ This native Node.js module allows you to manage an app's access to:
 * Speech Recognition
 * Protected Folders
 
+If you need to ask for permissions, your app must be allowed to ask for permission :
+
+* for a Nodejs script/app, you can use a terminal app such as [iTerm2](https://iterm2.com/) (it won't work on macOS Terminal.app)
+* for an Electron app (or equivalent), you'll have to update `Info.plist` to include a usage description key like `NSMicrophoneUsageDescription` for microphone permission.
+
 ## API
 
 ## `permissions.getAuthStatus(type)`