MetNordic point location (#18)

* implemented point location support, which closes #15

Author: moritzshore

NAMESPACE

@@ -23,6 +23,7 @@ importFrom(dplyr,mutate)
 importFrom(dplyr,nth)
 importFrom(dplyr,rename)
 importFrom(dplyr,summarise)
+importFrom(dplyr,tibble)
 importFrom(ggplot2,aes)
 importFrom(ggtern,ggtern)
 importFrom(grDevices,colorRampPalette)
@@ -54,6 +55,7 @@ importFrom(stringr,str_pad)
 importFrom(stringr,str_remove)
 importFrom(stringr,str_replace_all)
 importFrom(stringr,str_split)
+importFrom(utils,packageVersion)
 importFrom(utils,read.table)
 importFrom(utils,write.csv)
 importFrom(writexl,write_xlsx)