New Schema and UTC

• switched to lora_tracker_3
• consistent use of UTC
• add time source
• add all gateways
• add gateway and device labels
• add domains: SCI, JLDP, Staten, Falk
• add buffered status

Add payload decoders to AWS Lambda

v0.2.0

Merge branch 'main' of https://github.com/tnc-ca-geo/loratracker

First cloud version

v0.1.0

Update README.md