Added a check to Downloader.py to see if config.download.datadir has changed since file entry was created.
Made find_zaplist_in_tarball() use same verbosity as can_add_file() when called by can_add_file() in pipeline_utils.py
Set THEANO_FLAGS environment variable to set theano compiledir to a temporary dir on the worker node before calling rate_pfds.py.
The UBC pfd AI rating uses theano, and having several jobs trying to compile in the ~/.theano directory can cause problems.