1.6.3-dev3

Added latest improvements and bugfixes from sidoh

Improvements

• Add ability to select which group state fields (e.g., brightness, level, color, etc.) are served over REST endpoint and in MQTT payload. Previously these were fixed to a hardcoded list.
• Delay updates to MQTT state topic when JSON command with multiple components is sent. A single update is sent at the end with all of the state changes applied.

Bug fixes

• Fix buffer overrun for commands that buffer lots of packets (like level controls for CCT bulbs).
• Fix updates to group 0 not fanning out to group 4
• Remove some extraneous prints