knmiR: Import KNMI Data

#' @import checkmate
#' @import data.table
#' @import futile.logger
#' @importFrom methods extends as
#' @importFrom utils read.table download.file tail
#' @importFrom stats na.omit rnorm complete.cases
#' @importFrom ncdf4 nc_open ncvar_get nc_close
#' @importFrom xts .parseISO8601
#' @importFrom stringr str_replace_all
#' @importFrom magrittr '%>%'
#' @importFrom jsonlite fromJSON
#' @import sp
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