Pipeline enhancements

Lots of stuff in this one. Fundamentally, this merge updates OSG support and various requirements / file transfer configurations / singularity support. A major feature is that the pipeline now supports condor file-transfers on the LDG, as seems required.

User-facing changes:

• Add the option --transfer-files to the command line (or in the [condor] section of the config file) to enable file transfers. Use this option to fix GSL interp errors (hopefully). If things work out, we can make this default behavior in future.
• When using ASD files in the frtype dictionary, you must include the interp: part, just like you would at the command line
• Adds the accounting user in the submission file if defined (not required).
• To use the OSG, add --osg (and make sure you're using a container or cvmfs-deployed conda)

added 1 commit

• 2314db32 - un-noticed conflict in user-env

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merged

mentioned in commit cfa07414

mentioned in merge request !234 (closed)