Added pipeline requirements.

doc/vlbi

+┏━ LOFAR VLBI specific stuff and dendencies
+┃
+┃  Requirements.txt:
+┃   ┣━ numpy
+┃   ┣━ pyvo>="0.9.3"
+┃   ┣━ git+https://github.com/revoltek/losoto.git#egg=losoto
+┃   ┣━ multiprocessing
+┃   ┣━ functools
+┃   ┣━ argparse
+┃   ┣━ astropy
+┃   ┣━ casacore.tables
+┃   ┣━ datetime
+┃   ┣━ fnmatch
+┃   ┣━ glob
+┃   ┣━ logging
+┃   ┣━ matplotlib
+┃   ┣━ multiprocessing
+┃   ┣━ numpy
+┃   ┣━ os
+┃   ┣━ pyrap.tables
+┃   ┣━ re
+┃   ┣━ sys
+┃   ┗━ lofar.stationresponse
+┃
+┃
+┃
+┣━━┳━━ plugins/Pipelinestep_compareStationListVLBI
+┃  ┣━ lofarpipe.support.data_map
+┃  ┣━ pyrap.tables
+┃  ┗━ losoto.h5parm
+┃
+┣━━┳━━ plugins/Pipelinestep_DownloadCats.py
+┃  ┣━ numpy
+┃  ┣━ pyvo
+┃  ┣━ astropy.table
+┃  ┣━ astropy.coordinates
+┃  ┣━ astropy
+┃  ┣━ lofarpipe.support.data_map
+┃  ┣━ lofarpipe.support.data_map
+┃  ┗━ requests
+┃
+┣━━┳━━ plugins/Pipelinestep_TargetListToMapfile.py
+┃  ┣━ lofarpipe.support.data_map import DataMap
+┃  ┣━ lofarpipe.support.data_map import DataProduct
+┃  ┣━ numpy as np
+┃  ┣━ pyrap.tables, math
+┃  ┣━ astropy import units as u
+┃  ┣━ astropy.coordinates import SkyCoord
+┃  ┗━ astropy.table import Table
+┃
+┣━━━━━ makesourcedb
+┃
+┣━━━━━ losoto/bin/killMS2H5parm.py
+┃
+┣━━━━━ losoto/bin/H5parm_collector.py
+┃
+┣━━━━━ losoto – specifically, uses {{ losoto_directory }}/bin/losoto
+┃
+┣━━┳━━ bin/addIS_to_h5.py
+┃  ┣━ losoto.h5parm import h5parm
+┃  ┗━ losoto.lib_operations
+┃
+┣━━┳━━ bin/correct_array_factor.py
+┃  ┣━ losoto
+┃  ┣━ losoto.lib_operations
+┃  ┗━ lofar.stationresponse
+┃
+┣━━┳━━ bin/skynet.py
+┃  ┣━ astropy.coordinates
+┃  ┗━ astropy.table
+┃
+┣━━┳━━ bin/selfcal_difmap.py
+┃  ┣━ astropy.io import fits
+┃  ┣━ astropy.coordinates
+┃  ┣━ astropy.units
+┃  ┣━ astropy.coordinates
+┃  ┣━ astropy.coordinates.representation
+┃  ┣━ astropy.table
+┃  ┗━ bdsf
+┃
+┣━━┳━━ bin/gains_toCS_h5parm.py
+┃  ┣━ losoto.h5parm
+┃  ┣━ losoto.lib_operations import reorderAxes
+┃  ┣━ numpy as np
+┃  ┗━ casacore.tables as ct
+┃
+┗━━┳━━ bin/make_summaryVLBI.py
+   ┗━ numpy