1.17.0

• add source for AWB Bad Kreuznach, Germany
• add source for Wellington City Council, New Zealand (thanks @catatonicChimp)
• support events for recycleapp_be
• improve documentation (thanks @kellyatkinson, @snowstoked)
• add source for umweltprofis.at (thanks @andyboeh)
• add source for Stadtreinigung Dresden, Germany (thanks @tschnilo)