download statistic cleanup

[Bugreporter 93]

I dont know why, but I have a lot of duplicates of downloads at the same time and from the same user. Good for the statistic, but not really informative. Maybe it would better to cleanup all statistics from duplicate User-downloads and count only the latest download from the same user. And I think this problem is not only at my file.statistics.

Additional feature: Inform the Users, who have downloaded an older Version, that a new version is available. (i.e. Forum Notification, enable/disable per file)

Additional feature: Statistic how many users downloaded which Version (make only sense with the feature above)

[Droidz 2738]

Hello,

To remove old files: 2016-08-16_18-25-57.mp4

If user want keep informed about news: 2016-08-16_18-28-15.mp4