Recommend not redirecting stderr

[mvdbeek]

This makes tool debugging a lot harder. I encountered this with the raceid tools, but also other cases in the past. If a complete log file is necessary I'd recommend something like:

command > >(tee -a stdout.log) 2> >(tee -a stderr.log >&2)

[mvdbeek]

playing around with this some more I think Galaxy should provide something like from_stderr in the data parameters ... Galaxy already captures this in the job run, and that would remove some particularly bad boiler plate from the wrappers.