Separate vampire loss from energy used driving

This seems to not even come close to covering the actual vampire loss (and the
reson is, I think, that when not driving the sample frequency goes down so
much).

Signed-off-by: Dirk Hohndel <dirk@hohndel.org>
Hack to try to match stats data with data displayed in car

The energy used displayed in the car in the 'trip' display seems to match
rather closely to what we calculate here if we apply this unexplained
correction. I really don't like this, but the results that are shown are much
better with this.

Signed-off-by: Dirk Hohndel <dirk@hohndel.org>
Calculate vampire loss by looking at the chargeState data

Much more accurate than trying to get it from the streaming data.
I'm still puzzled with the results for some days, but this is certainly a step
in the right direction.

Signed-off-by: Dirk Hohndel <dirk@hohndel.org>
Merge pull request #38 from dirkhh/improveStats

Improve stats