find_all_station_names: Find all variants of station' names
Description
For IMGW-PIB stations different naming were used historically. For example,
POZNAŃ and ``POZNAŃ-ŁAWICA, thus both names should be used when searching
for the station. This function finds all variants of station' names
status information and expand the created object
Usage
find_all_station_names(station_name)
Value
character vector of station names with all variants of station's names