Feature: Add <location> tag to <file_script> to get file script from remote location

Hi,

I have a pretty long bash script as a <file_script>, modifying one of 
the files provided via <file>.

I tried to move the script source out of the XML file by using a 
<location> tag instead of the <source> inside the <file_script>. But it 
looks like this is not supported yet...would be nice to have though!

Best regards,
J Brauchle