fix bug https://github.com/AriaLyy/Aria/issues/543#issuecomment-559733124

fix bug https://github.com/AriaLyy/Aria/issues/542
fix bug https://github.com/AriaLyy/Aria/issues/547
修复下载失败时，中断重试无效的问题
增加忽略权限检查的api，`ignoreCheckPermissions()`

py/.vscode/launch.json

@@ -1,15 +0,0 @@
-{
-    // 使用 IntelliSense 了解相关属性。 
-    // 悬停以查看现有属性的描述。
-    // 欲了解更多信息，请访问: https://go.microsoft.com/fwlink/?linkid=830387
-    "version": "0.2.0",
-    "configurations": [
-        {
-            "name": "Python: 当前文件",
-            "type": "python",
-            "request": "launch",
-            "program": "${file}",
-            "console": "integratedTerminal"
-        }
-    ]
-}

py/.vscode/settings.json

@@ -1,6 +0,0 @@
-{
-    "python.linting.pylintEnabled": false,
-    "python.linting.pep8Enabled": true,
-    "python.linting.enabled": true,
-    "python.pythonPath": "/usr/local/bin/python3.7"
-}