Only clean on exit, not after compile (DVI will be gone).

rubberin

@@ -71,7 +71,7 @@ def compile(infile, mode)
   ret = system "rubber --inplace #{mode_opt} #{params} #{infile} 2> #{err_file}"
   File.open(err_file) { |file| puts file.read }
   # Remove the output save file if compile was succesful.
-  clean(infile) if ret
+  #clean(infile) if ret
 end
 
 # Start the right viewer based on the mode.