Switch to RabbitMQ Message Broker

Today we made a big transition today to using RabbitMQ - the world’s most popular open-source message broker. It has a ton of features we’re excited to start using, and this is laying the foundation needed for the auto-sync feature that won the community vote a while back. For all FarmBots that are using my.farmbot.io and have FarmBotOS v5.0.5 or later installed, your device has most likely already switched over to the new message broker automatically, and there is no need to make any changes on your end. For devices that have FarmBotOS v5.0.4 or older, you will need to power cycle your FarmBot to have it connect to the new broker (unplug power, wait 10 seconds, plug it back in). Check the connectivity panel on the Device page to see if your FarmBot has successfully connected to the new message broker. Please note: we will be shutting down the old message broker in about a week. In other news, the latest two minor releases of FarmBotOS (5.0.5 and 5.0.6) have included other small improvements, including a fix for the double image upload bug. Thanks @Ascend for reporting that issue on GitHub.