return value problem for entire-space-NA was solved

See merge request !21

Dev analogs large scale

See merge request !20

# Conflicts:
#   R/Analogs.R

NA in time removed

See merge request !19

added error for sorted members, which cannot be used because hindcasts and forecasts have generally different ensemble members

when observations are already given pointwise, there's no need to interpolate...

See merge request !17