任务组bug修复，修复子任务下载完成后重新下载的问题

aria/src/main/AndroidManifest.xml

@@ -3,7 +3,6 @@
 
   <application
       android:allowBackup="true"
-      android:label="@string/app_name"
       android:supportsRtl="true">
 
   </application>

aria/src/main/java/com/arialyy/aria/core/Configuration.java

@@ -168,6 +168,7 @@ class Configuration {
             }
             field.setAccessible(true);
             String value = properties.getProperty(field.getName());
+            if (TextUtils.isEmpty(value) || value.equalsIgnoreCase("null")) continue;
             Class<?> type = field.getType();
             if (type == String.class) {
               field.set(this, value);

aria/src/main/java/com/arialyy/aria/core/upload/UploadTask.java

@@ -110,7 +110,7 @@ public class UploadTask extends AbsNormalTask<UploadEntity> {
       saveData(IEntity.STATE_POST_PRE, 0);
     }
 
-    @Override public void onStart() {
+    @Override public void onStart(long startLocation) {
       sendInState2Target(ISchedulers.START);
       saveData(IEntity.STATE_RUNNING, 0);
     }