Add basic support for b516 energy statistics

[filippz]

This PR introduces basic support for "b516" statistics present in some bai (possibly only present in HW: 7603) gas boilers and hmu heat pumps which don't support PrEnergyCount*/PrEnergySum* values.
Details are explained in the first post here: #490 (comment) and during the discussions there we came to an agreement that only 14 of most useful values are to be defined, although the script (https://gist.github.com/filippz/c0d04e4d607e27fc6b89d127db0ee941) can generate 10794 values based on our findings.

Testing and comments are welcome.

[chrizzzp]

One should add that the b516 energy statistics are also available from other (including non-heat-generation) circuits, e.g.

• VRC720 regulator (confirmed for ID=CTLV2;SW=0514;HW=1104)
• mixer units (confirmed for ID=VR_71;SW=0104;HW=0503)
• hydraulic station (confirmed for ID=VWZ00;SW=0522;HW=5103)

Depending on the device functionality, these statistics will report in all cases the electrical power consumption of the individual device (general consumption, even if low compared to heating power consumptions).

In addition to that, the VRC720 regulator can also provide the b516 energy statistics for e.g. a solar circuit (if controlled by the regulator) and the b516 energy statistics of an hydraulic station (if equipped with backup heating device, e.g. immersion heater) will report electrical consumption for the backup heating device (hc/hwc) and total consumption (including also decive standby energy).

It is expected also other devices support the b516 statistics.

[filippz]

I've added appropriate includes to 15.ctlv2.tsp, 26.vr_71.tsp and 76.vwz.tsp based on your experience.
We could try to split b516_inc.tsp into more logical files so we can include only appropriate values (for example Fuel* values make sense only in 08.bai.tsp) and do some conditional includes (for example as not all bai support b516 statistics and the ones that do don't support PrEnergy* values) but this PR aims to just add basic support and get more feedback about b516 supported devices.

[filippz]

I've removed SolarCoolingSystem based on this comment: #490 (comment)