Testing Script attachments

[Ofnuts]

I have enabled 7z (but not .rar).

I pondered .py and .scm... For .py,

1. it could be executed by default on Windows, so it's a security problem
   
2. for Linux & OSX, it's the opposite, it won't be executable by default, and you have to remind everybody to set the flag (something that many OSX people don't know how to do), but if you package it in a .zip or 7z, it gets the executable flag automatically when you unzip. You can think that this is in contradiction with 1), but at least the user had to 1) explicitly unzip the file and 2) manually invoke it...
   

I agree this isn't a problem with .scm, but then I would have to explain why .scm and not .py