support loop and screenshot

Plugin.php

@@ -159,8 +159,8 @@ EOF;
             'live' => false,
             'autoplay' => false,
             'theme' => isset($atts['theme']) ? $atts['theme'] : '#FADFA3',
-            'loop' => false,
-            'screenshot' => false,
+            'loop' => (isset($atts['loop']) && $atts['loop'] == 'true') ? true : false,
+            'screenshot' => (isset($atts['screenshot']) && $atts['screenshot'] == 'true') ? true : false,
             'hotkey' => true,
             'preload' => 'metadata',
             'lang' => isset($atts['lang']) ? $atts['lang'] : 'zh-cn',

README.md

@@ -4,7 +4,7 @@
 ### 使用方式
 下载后将文件夹名改为DPlayer上传启用即可
 
-默认不自动播放，弹幕开启
+默认不自动播放，弹幕不开启
 ```
 [dplayer url="http://xxx.com/xxx.mp4" pic="http://xxx.com/xxx.jpg"/]
 ```