Release 0.2.4 * Add proper error handling and show them via the API (#25) * Run map refresher as an ad hoc liftoff fairing in Rocket * Changed emojis in log output * Removed `AQI_max` and `pollen_max` from the forecast JSON introduced in version 0.2.0 * Verify sample coordinate bounds (#24) * Default to current time if `Last-Modified` HTTP header is missing for retrieved maps