Espalexa v2.4.0

• Added more emulatable device types (white spectrum only, color only)
• Enabled color capability for Echo Dot speakers
• Removed color device callback
• Added new universial EspalexaDevice* callback
• Added fully featured example

Espalexa v2.3.3

• Added ESPAsyncWebserver support
• Fixed various discovery issues

Espalexa v2.2.0

• Added support for color devices!
• Dimmable only devices will no longer be shown as color devices in the Alexa app