Aeon HEMv1 Energy

Modified from SmartThings AEON Home Energy Meter.  Took code from Barry A. Burke's updated device handler for AEON HEM version 2.  Version 2 supports Amps and Wattage, where Version one only supports Energy and Power.  I took the cost calculation from Barry's code and applied it to the original SmartTHings code.  And allowed you to select for viewing, Energy, Power or Cost.