submit script: dummy_beamspot use.
submit script: ttbar alignment reco.
dummy_beamspot: modify output module commands to keep it.
ntuple running; set conditions on pat/ntuple process where needed.
"no_skimming_cuts: don't fail on SelectEvents not existing.
dummy_beamspot: follow MakeSamples.modify.
Fix covariance matrices (symmat with 28 unique entries, not mat with 49...).
Fix skip_common_files.