Add examples to readme

README.md

@@ -1,2 +1,15 @@
 # cordova-plugin-detect-screenshot
-Detects screenshots on Cordova for iOS
+Detects screenshots on Cordova for iOS. The plugin will only work on devices with iOS > 7, however feel free to include this plugin in projects with a lower target than iOS 7. The plugin checks the iOS version before listening for events, so it won't break anything.
+
+## Installation
+`cordova plugin add cordova-plugin-detect-screenshot`
+
+## Usage
+When a screenshot occurs, a 'screenshot' event is triggered. Simply listen for this event in your javascript.
+
+    document.addEventListener("screenshot", function() {
+        window.alert("Screenshot");
+    }, false);
+
+## License 
+MIT.