v0.9.0

Major rewrite with many new features:

• configuration via UI (only)
• new fan model with speed settings
• attributes as sensors
• diagnostic sensors for filters and water level
• control switches and selects for child lock, display backlight, light brightness, humidity target and humidifier function
• dynamic icons to show fan state, humidification function or warn for upcoming filter change or low water level
• original Philips icon set is included as well
• new models AC2936, AC3039, AC5659

Note: the Philips devices still have a buggy local CoAP implementation, so the integration is not very reliable