Adapted political party effects to "best" for all parties.

There is a range of political bundle effects and it goes like this:

Percentage of power the policital party holds - Political effect bundle which then takes place
0 - min
15 - very_low
30 - low
45 - average
60 - best
70 - high
80 - very_high
90+ - max

Decided to go with best, as I didn't want the game to be too easy and not too hard. These effects will be perminent as the power of a political party won't change anymore as its just one party per faction.

There are can be heavy positive/negative effect, depending on the effect bundle.

Initial release