add getInstance mehtod like in UploadedFile

Author: igogo5yo

README.md

@@ -32,18 +32,31 @@ Usage
 **Example 1**
 ```php
 $model = new Post();
+$model->load(Yii::$app->request->post());
+
+$file = UploadFromUrl::getInstance( $model, 'image' );
+
+//if second parameter is TRUE it writes uploaded file path to this model property
+$file->saveAs( 'uploads/yii.png', true );   
+
+echo $model->image; // uploads/yii.png
+```
+
+**Example 2**
+```php
+$model = new Post();
 $model->image = 'http://static.yiiframework.com/files/logo/yii.png';
 
 $file = UploadFromUrl::initWithModel( $model, 'image' );
 
-//if second parameter is TRUE it writes uploaded file path to this model property 
+//if second parameter is TRUE it writes uploaded file path to this model property
 $file->saveAs( 'uploads/yii.png', true );   
 
 echo $model->image; // uploads/yii.png
 ```
 
 
-**Example 2**
+**Example 3**
 ```php
 $url = 'http://static.yiiframework.com/files/logo/yii.png' ;
 $path = 'uploads/yii.png';
@@ -57,7 +70,7 @@ $model->image = $path;
 ```
 
 
-**Example 3**
+**Example 4**
 ```php
 $url = 'http://static.yiiframework.com/files/logo/yii.png' ;
 $path = 'uploads/yii.png';

composer.json

@@ -22,7 +22,7 @@
     },
     "autoload": {
         "psr-4": {
-            "igogo5yo\\uploadfromurl\\": ""
+            "igogo5yo\\uploadfromurl\\": "src"
         }
     }
-}
+}

FileFromUrlValidator.php renamed to src/FileFromUrlValidator.php

@@ -77,7 +77,7 @@ public static function initWithUrl($url)
     	]);
     }
 
-	public static function initWithModel(ActiveRecord $model, $attribute) 
+	public static function initWithModel($model, $attribute)
 	{
         return self::createInstance([
     		'url' => $model->{$attribute},
@@ -87,7 +87,7 @@ public static function initWithModel(ActiveRecord $model, $attribute)
     	]);
 	}
 
-	public static function initWithUrlAndModel($url, ActiveRecord $model, $attribute)
+	public static function initWithUrlAndModel($url, $model, $attribute)
 	{
         return self::createInstance([
     		'url' => $url,
@@ -97,6 +97,11 @@ public static function initWithUrlAndModel($url, ActiveRecord $model, $attribute
     	]);
 	}
 
+    public static function getInstance($model, $attribute)
+    {
+        return self::initWithModel($model, $attribute);
+    }
+
 	public function saveAs($file, $saveToModel = false)
 	{
 		if ($saveToModel && $this->isWithModel) {