Batch IMG2IMG files naming, and generation parameters text files implementation

[ARandomUserFromGithub]

Hi, it would be very useful that every files produced in batch were named with a random suffix so it doesn't overwrite pre-rendered files, also it would be great if entering a destination directory name that doesn't exist yet would create a new directory instead of causing an error. Finally, it would be very useful if the produced images each included their Generation Parameters in a text file, as when generating single images.