daily data downscaling bug is fixed for linear and logistic regression. Also, find.nn function was fixed

Forecast dwn + 4nn -> 9nn

See merge request !22

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