Added 4 new events, Improved difficulty options, Better rare earth metals model — Democracy 4 Steam update #1158980

1) Difficulty slider now influences how frequently assassination attempts can be made. 2) Fixed bug where the polls screen could not be loaded correctly by the 'go back' buttons. 3) Changed the debt crisis icon so its more understandable. 4) Difficulty slider now influences chances of a successful assassination attempt. 5) Difficulty slider now influences the true success chance of a media spin event. 6) Difficulty slider now influences the final chance of a minister resigning. 7) South Korea now reverses surname and forename when both are shown. 8) Changed 'none' to 'minimum' for many sliders so they are less confusing. 9) Fixed a bug where new policies implemented due to donor demands didn't affect cynicism or show up on timeline. 10) Reduced the political capital cost of the speed cameras policy. 11) You now cannot cancel any policy the same turn you implemented it, even if it was a d...