hystReet 0.0.3

Use new API URL: https://api.hystreet.com (thanks to @yannikbuhl)
Add parameter no_metadata to get_hystreet_station_data (thanks to @yannikbuhl)

hystReet 0.0.2

Changed vignette examples to fit to new API structure
Add new examples
Change to minimal R-Version 3.5.0 due to saved data sets

hystReet 0.0.1

Initial version