Tivoli Matrix U2.3 Modular

Required libraries:
- ProjectUNION Core 0.3.1
- ProjectUNION DCC 0.3.0
- NmraDcc
- FastLED

This project must not require:
- ProjectUNION MQTT
- PubSubClient

Test:
1. Compile and note program and RAM size.
2. Upload and test WiFi/web configuration.
3. Test DCC addresses and all effects.
4. Test small and large matrix.
5. Test LED strips A, B and C.
6. Test demo mode and sign text.
7. Test OTA.
