o [andybunn] deprecate i.detrend() and i.detrend.series() in favour of the
  app; rarely used. (1.8.0 gave i.detrend() the rwi class and a record of
  each series' method, the minimum while it is still here.)

o [andybunn] An evolutive AR spectral analysis program using the Kalman filter? 

o [andybunn] ssf vignette? Better to leave that all in LTLdplR?

o [andybunn] multiple RCS

o [andybunn]  reader for *-rwl-noaa.txt

o [andybunn]  In preparation for reconciling dplR and the developing dplPy this is a good time to revisit many of the "small" choices that exist in dplR. The first discussed by me and KJA is the high freq standardization threshold used in the xdating functions. We should maybe just ape COFECHA directly. 32-yr spline followed by AR with a max lag of five. Any change of this magnitude (and there will be others I expect) should wait for dplR 2.0 timed to the release of dplPy. Sigh. 

o [andybunn]  Victoria H func for EW/LW.

o [andybunn]  json readers and writers?

