[unification] merge postprocessor

__init__.py

compiler.py

core/__init__.py

core/abc.py

core/export_pdf.py

core/functions/__init__.py

core/functions/tracks.py

core/group.py

core/lineageprocess.py

core/multisignal/__init__.py

core/multisignal/aggregate.py

core/multisignal/align.py

core/multisignal/crosscorr.py

core/multisignal/mi.py

core/processes/__init__.py

core/processes/autoreg.py

core/processes/bud_metric.py

core/processes/buddings.py

core/processes/butter.py

core/processes/catch22.py