Allow 7zip to extract .ISO Files

[gregsterb]

I just wanted to say first that this script is amazing. Thank you very much for the time you've put into making this and also sharing it with us!

That said, I'm curious how difficult it would be to implement an option to find/extract .iso files. 7zip using the command "7z x filename.iso" will extract these files. I took a look at the code and unfortunately I'm no where near the level of understanding in bash to contribute this addition. I did look though!

Thanks in advance!