Insteon_Energy:  Add Support for iMeter Solo and SynchroLinc

Initial draft, I don't have either device, so I can't test much.
Insteon_Energy: Request Status for iMeter Should be Standard Message
iMeter: Fix Bug with Refresh State; Add Get_Power Sub
iMeter: Always Attribute iMeter Request Status Responses to Self
iMeter: Fix Glitch in Setting Power Value to State
iMeter: Needed to Remove Message from Device Command Stack
Merge pull request #374 from krkeegan/insteon_energy

Add Support for Insteon iMeter Solo and SynchroLinc