[Therion] Cross platform clean-up of system commands

[Tarquin Wilton-Jones]

I have a hackaround that basically allows code branching on Windows and 
Linux/Mac from within Therion's system command, so it always clears up 
temp files no matter what the platform is.

Create a file called "rm.bat" in the .thconfig directory. Give it these 
contents:

@echo off
::simulate the Linux rm command on Windows, since Therion's "system"
::command cannot cope with code branching for platforms
if "%~2"=="" exit /b
del "%~2" 2>nul

Then the .thconfig can use this:
system "rm -f deleteme-temp.pdf"

On Linux, it uses the native "rm" command, and -f means it can silently 
ignore any temp files that didn't get created.

On Windows, it uses rm.bat, and that redirects any error messages to 
nul. So Therion always considers it a success no matter what, and files 
get cleaned up no matter what.

Anyone have anything better?
(Did anyone cringe from that "solution"?)

Cheers,

Tarquin