Auto password detecting

Hi

I added auto password detection, i don't really know what i exactly doing, because i really don't know much about zip archiving. 

I needed this because i implementing big application for client, where i need to download large ammount of files, lot of files are zip archives and some of them are password protected. And i can't write condition for each specific file. 

Its up to you if you want to use this, and maybe improve it.

Best regards, 

L.Mareda (Tragi)