新增组合任务url重复检查 https://github.com/AriaLyy/Aria/issues/395

初始化任务时，如果url、path有错误将会回调`@Download.onTaskFail`、`@Upload.onTaskFail`、`@DownGroup.onTaskFail`

build.gradle

@@ -43,7 +43,7 @@ task clean(type: Delete) {
 ext {
   userOrg = 'arialyy'
   groupId = 'com.arialyy.aria'
-  publishVersion = '3.6.4_dev_2'
+  publishVersion = '3.6.4'
 //  publishVersion = '1.0.4'  //FTP插件
   repoName='maven'
   desc = 'android 下载框架'