added na.rm, apply_to and alpha parameters and their checks. Changed na.rm=T for na.rm=na.rm everywhere. Added documentation.

Vignette and CDS_Seasonal_Downloader

See merge request !93

New parameters and change to checks: 'memb_dim' and 'sdate_dim'

See merge request !92

Fixes on QuantileMapping correctly handle exp_cor and dependencies

See merge request !82

# Conflicts:
#   NEWS.md

PlotTriangles4Categories new parameter cex_axis

See merge request !87

Vignettes review

See merge request !90

Develop vignette most likely tercile

See merge request !85

MultiMetric accepts probabilistic metric 'RPSS'

See merge request !86