Extended Finances v1.0.0.0

The finance extension adds subventions for more realism.
subvention:
Everyday at 4p.m. subvention are transferred depending on the economic difficulty and field size. With "seasonal groth" this is done once for the year on january.
The calculation uses average values for germany from the EU agricultural policy. After first save the values can be changed in the XML "extendedFinances" in the savegame folder.