Updated with balance improvements, UI tweaks and bug fixes

[1.29]

1. Fixed bug relating to sound card drivers. Sound engine can now be overriden in prefs.ini
2. Fixed issue where driverless cars situation would not trigger correctly.
3. Party names can be edited simply by clicking the name instead of the up/down arrow now. (On customise mission screen).
4. Party names on customize mission screen sorted alphabetically, and scale to whole window if only 2 parties selected.
5. Fixed a bug where disabling the third party on countries that have it by default was being ignored.
6. Fixed crash bug when renaming a minister then clicking next turn.
7. Re-designed immigration system so factors feed into immigration demand, which then applies to illeghal or normal immigration depending on rules.
8. New gears icon shows and is clickable on a policy or other effect that has additional factors included in its calculations.
9. Rebalance of GDP at the high end, so that some inputs fade off their effects gradually, making maximum GDP harder to attain.
10. Pollution now contributes to Respiratory Diseases.
11. The Real Estate Bubble makes people more socialist.(anger at house prices).
12. New tab on choose country screen shows special adjustments to the games code made for each country.
13. Added country flag to election results screen.
14. Fixed dumb bug where after 49 victory entries in the political compass, the last one got overridden constantly.
15. Welfare fraud department now boosts Bureaucracy slightly whereas Universal Basic Income (UBI) reduces it.
16. No achievement checks are now carried out if the game has had political capital disabled.
17. Private space program now harder to achieve
18. Socialists now slightly angered by the Gig Economy.
19. Gridlock and Obesity situations now slightly rarer.
20. Prison overcrowding now equally reduced by state and private prisons.
21. Black market situation slightly easier to trigger.
22. High GDP has a mroe skewed impact on Wages now.
23. Reduced base impact of Quantitative Easing on GDP.