Manage multiple Iot Agents

[nickdex]

Right now only one agent works with Raspberry Pi.

• IoT Layer - Update message queuing to so that multiple agents can be controlled - Update message queuing to handle multiple agents #38
• Server Layer - Split and create separate entities for Room and IotAgent - Create separate entities for room and iot agents #39
• Frontend Layer - Update UI, so that user can select room and to show devices in a room.