RFd: Adding Energy consumption as entitity

[lucode]

Actually the integration provides three Energy flow values in Vebus from which none is showing my Energy consumption :
(Even tried to derive it from them)

• sensor.victron_vebus_acin1toacout
• sensor.victron_vebus_invertertoacin1
• sensor.victron_vebus_invertertoacout

With my old Modbus templates I did create this value with this template:

- platform: integration
  source: sensor.ac_consumption_l1
  name: "Multiplus Total Energy"
  unit_prefix: k
#  unit_time: d
  round: 2

But it would be nice to have it integrated in the Integration.
My version is: 0.0.11