New 2016 Herschel calibration constants

See merge request !37

Update IOVs to explicitly add uncalibrated periods before and after, and to update new constants for pp

New Ecal calibration for 2016

See merge request !27

Figure of merit updates to version 3

See merge request !21

Figure of merit updates to version 3, correcting a bug in convolution that ws particularly visible in 2016

Merge branch 'johndan-newHerschelCalibration' into 'master'

See merge request !9

Commit of Herschel calibration v2

See merge request !7

(cherry picked from commit 8814ef07)

08ff758d Commit of Herschel calibration v2