Viewing errors, outputs and scripts for tasks

[pagrubel]

Should we have a way to view output and errors that are generated in the bee_workdir/<wf_id>/<task_name-task_id>.err .out and .sh files that we generate. A user may be interested in possible errors generated by the script without having to figure out where they are in the .beeflow (default) directory.
This may become especially pertinent as they can add their own command in the pre and post scripts.