Influence coming from buildings should be changed

Influence for political parties should be grown from the part coming from buildings in long term and short term.

Reason:
- in the short term, people against something new are more vocal than people for something new.

- in the long term, people get used to it and the building changes the society.

Exemple:

A new military building should give, before results are changed by population:

- the pacifists faction a 12 turn boost in influence.

- the militarists faction get half of this boost, but long term like today (or not half but 0.618 :p sorry, golden ratio again).

(numbers just for exemple)
Say :
* Era 1 building gives 100 points to a supporting faction and 161 (for 12 turns) to an opposite faction.

* Era 2 building gives 200 points to a supporting faction and 322 (for 12 turns) to an opposite faction.

* Era 3 building gives 300 points to a supporting faction and 485 (for 12 turns) to an opposite faction.

* Era 4 building gives 400 points to a supporting faction and 647 (for 12 turns) to an opposite faction.

* Era 5 building gives 500 points to a supporting faction and 809 (for 12 turns) to an opposite faction.

Then, each bonus get changed by population then renormalized as % for elections.

The 12 turn temp bonus could also be (for Era 1):
- a 9-turns 161 bonus

- then replaced by a 2-turns 100 bonus

- then replaced by a 1-turn 61 bonus

- then 0.