Enhancement: use rclone to store objects in cloud

[malaybasu]

It will be nice to have rclone support in git fat, so that I can use one of the could storage services to store my big files. This will really make git-fat a true replacement of git-lsf.

[jedbrown]

I realistically don't have time to implement this, but would be happy to merge it so long as it doesn't break backward compatibility for existing users. Also note that git-fat predates git-lfs, and the latter has a lot more resources behind it.

[malaybasu]

Okay. I will give it a try. It should be pretty simple in a way. git-lfs is not an option for us. We are heavily depended on git fat. It works perfectly for us. It is a wonderfully simple software and please don't give up the development. I will come back to you if I need to understand the code a bit.