fix(demo): fix demo dependencies and update README

Author: Merott

README.md

@@ -28,4 +28,27 @@ If you're using the plugin with Angular 2, the plugin automatically registers
 
   ```html
   <PDFView [src]="'http://www.pdf995.com/samples/pdf.pdf'"></PDFView>
-  ```
+  ```
+
+# Try the Demo
+
+To try the demo, `cd` into the `demo` folder, and run the following commands:
+
+```sh
+npm install
+
+# iOS
+tns platform add ios
+tns run ios
+
+# Android
+tns platform add android@2.2.0-next-2016-08-02-918
+tns run android  # try again if you get error "more than one library ..."
+```
+
+## Why the dependency on `android@next` platform
+
+I've been getting all kinds of different issues trying to run this plugin with
+the latest released version of `tns-core-modules` and `tns-android` runtime, and
+the issues don't appear to exist in the current pre-release versions. Therefore
+for the time being I've set the dependencies to pre-release versions.

demo/package.json

@@ -5,13 +5,13 @@
       "version": "2.1.1"
     },
     "tns-android": {
-      "version": "2.2.0-next-2016-07-15-870"
+      "version": "2.2.0-next-2016-08-02-918"
     }
   },
   "private": true,
   "dependencies": {
-    "nativescript-pdf-view": "file:..",
-    "tns-core-modules": "2.2.0-2016-07-14-3692"
+    "nativescript-pdf-view": "1.0.1",
+    "tns-core-modules": "2.2.0-2016-08-07-3885"
   },
   "devDependencies": {
     "babel-traverse": "6.7.6",
@@ -22,4 +22,4 @@
     "nativescript-dev-typescript": "^0.3.2",
     "typescript": "^1.8.10"
   }
-}
+}