Updated README a bit for iOS

Author: devgeeks

README.md

@@ -1,10 +1,18 @@
 FileViewerPlugin
 ================
 
-Cordova File Viewer Plugin for Android based on the WebIntent plugin by Boris Smus (@borismus) - https://github.com/phonegap/phonegap-plugins/tree/master/Android/WebIntent
+Cordova File Viewer (as well as Sharing) Plugin for Android and iOS.
 
-This has been modified to only contain the parts needed and some methods were renamed, etc.
+The Android side is based on the WebIntent plugin by Boris Smus (@borismus) - [https://github.com/phonegap/phonegap-plugins/tree/master/Android/WebIntent](https://github.com/phonegap/phonegap-plugins/tree/master/Android/WebIntent). This has been modified to only contain the parts needed and some methods were renamed, etc.
 
-It was created for the SpiderOak Mobile Client project - https://github.com/SpiderOak/SpiderOakMobileClient
+The iOS side uses `UIActivityViewController` and `UIDocumentInteractionController`.
+
+It was created for the SpiderOak Mobile Client project - [https://github.com/SpiderOak/SpiderOakMobileClient](https://github.com/SpiderOak/SpiderOakMobileClient)
+
+One downside of having been written for just Android first is that there are some Androidisms in the iOS plugin (such as passing `android.intent.extra.STREAM` in the extras params etc). Fixing this, and better documentation, will be done soon.
 
 Follows the [Cordova Plugin spec](https://github.com/alunny/cordova-plugin-spec), so that it works with the [Cordova CLI tools](https://github.com/apache/cordova-cli/).
+
+`cordova plugin install https://github.com/SpiderOak/FileViewerPlugin.git`
+
+`phonegap local plugin install https://github.com/SpiderOak/FileViewerPlugin.git`