Updated the extended script.
Merge remote-tracking branch 'origin/dev' into dev
Updated some of the acf_ tools.
Renamed spflag.py to acf_spflag.py
calc_sefd_wm.py digs into the MS to calculate the SEFD for dishes, based on the
correlation coefficient.
Updated calc_sefd_wm.py to loop over visibilities.
Merge remote-tracking branch 'origin' into dev
Added default mask cutoff to the selfcal module.