Font_FIX: FIX CALC_BUG in pmf from capacity.

* calc, model: Store IN calced fields in out-model.
* FIXATE `b` fitting-param to 0.
* model: FIX renamed `/engine/fuel_lhv` property.
Merge remote-tracking branch 'origin/master'
Merge pull request #1 from gfon/master

Calc fixes from gfon