Merge pull request #3 from ptkdev/master

[Update] Permissions and fix code minor issue

README.md

@@ -10,58 +10,75 @@ Note: Photo Library only available in iOS 8+
 cordova plugin add https://github.com/CoSchedule/cordova-photo-library.git
 ```
 
+Permissions (iOS)
+------
+Add PhotoLibrary Permission to plist file in `/platforms/ios/[APP NAME]/[APP NAME]-info.plist`
+```
+<key>NSPhotoLibraryUsageDescription</key>
+<string>why app use permission</string>
+```
+
+Permissions (Android)
+------
+Add write permission to AndroidManifest.xml file in `/platforms/android/app/src/main/AndroidManifest.xml`
+```
+<uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE" />
+<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
+```
 
 Methods
 ------
 
  - Image from Image
    ```
    const options = {
-       imgElm: //required,
-       albumName: //optional,
-   }
+       imgElm: "file://localhost/test.jpg", //required
+       albumName: "test" //optional
+   };
        
-   cordova.plugins.PhotoLibrary.imageFromImage(options, callback, errback) // imgElm  must have been loaded
+   cordova.plugins.PhotoLibrary.imageFromImage(options, callback, errback); // imgElm  must have been loaded
    
    ```
 - Image from Canvas
   ```
     const options = {
-         canvas: //required,
-         albumName: //optional,
-     }
+         canvas: "id_canvas", //required
+         albumName: "test"  //optional
+     };
       
-    cordova.plugins.PhotoLibrary.imageFromCanvas(options, callback, errback)
+    cordova.plugins.PhotoLibrary.imageFromCanvas(options, callback, errback);
   
   ```
 - Image from Base64
   ```
     const options = {
-        base64String: //required,
-        albumName: //optional,
-    }
+        base64String: "hash_code", //required
+        albumName: "test" //optional
+    };
       
-    cordova.plugins.PhotoLibrary.imageFromBase64(options, callback, errback)
+    cordova.plugins.PhotoLibrary.imageFromBase64(options, callback, errback);
   
   ```
 
 - Image from URL
   ```
     const options = {
-        url: //required,
-        albumName: //optional,
-    }
+        url: "https://site.io/test.jpg", //required
+        albumName: "test" //optional
+    };
       
-    cordova.plugins.PhotoLibrary.imageFromUrl(options, callback, errback)
+    cordova.plugins.PhotoLibrary.imageFromUrl(options, callback, errback);
   
   ```  
 - Video from URL
   ```
     const options = {
-        url: //required,
-        albumName: //optional,
-    }
+        url: "https://site.io/test.mp4", //required
+        albumName: "test" //optional
+    };
       
-    cordova.plugins.PhotoLibrary.videofromUrl(options, callback, errback)
+    cordova.plugins.PhotoLibrary.videofromUrl(options, callback, errback);
   
   ```
+
+Note: if don't need callback success/fail replace with `null`: `(options, null, null)`