hereR 0.2.1

• Enhanced traffic(): Clarified that from_dt and to_dt have no effect on the traffic flow (product = "flow"). Traffic flow is always real-time. Detailed documentation of the variables in the return value.
• Improved coverage of testthat.
• Added an "id" column to the output of geocode() and removed the id ordered row.names in order to be consistent with other functions of the package. Using the "id" column the addresses to geocode can be joined to the coordinates after geocoding (see #9).
• Added an "id" column also to autocomplete(), reverse_geocode(), route(), isoline(), traffic() and weather(). Using the "id" column the result can be joined to the input.
• Fixed the handling of failing requests in .get_content(). The "id" column is still in correct order, even if there are failing requests in a function call (see #17).
• Added rownames() <- NULL to all functions before returning the result.
• Renamed the "city" column in the returned object of weather() to "station", as it stands for the name of the nearest meteorological station.
• Test for empty geometries in the input POIs and AOIs and throw an error if some are found (see #16).