Release 0.2.1

Changes

• Add support for Shelly Plug US
• Add support for Shelly UNI
• Add RSSI_Level that show wifi status like "Excellent, Very Good, Good, Bad"
• Fix bug for new devices showing number instead of room name for new devices
• Add voltage attribute to PowerMeter
• Fix problem with shared zero-config in older versions of HA
• Add default setting to sensors
• Add switch sensor to default sensors
• Change icon on volt and current sensors
• Tried to minimize updates in HA for smaller history log
• Fix current consumption for EM and 3EM when CoAp not working #431
• Fix Status Switch and Voltage when Shelly 2/2.5 #430