Updated to build 1.21

[1.21]

1) Fixed issues running on low res screens, so minimum screen height is now only 768 res.
2) Achievements window now has 4 columns on really large screens.
3) Fixed bug where perception inputs window could open *behind* the spin event results.
4) Some graphical 'polish' changes.
5) Germany - Reduced strength of Welfare Fraud Dept.
6) Germany - Reduced spending on Disability benefit
7) Germany - Wire Tapping added at a low level.
8) Germany - Immigration and Refugee rules more lenient.
9) Germany - Charity tax Relief increased.
10) Germany - Added a carbon tax.
11) New Policies: Unexplained Wealth orders, Border Navy, Packaging Tax, Plastics Tax, Water Meters, Desalination Plants.
12) Mortgage tax relief now less costly to implement, Food labelling slightly more costly.
13) Removed duplicate link between Inflation and Cryptocurrency adoption.
14) Fixed bug where credit rating not displayed correctly on tooltip for credit rating change.
15) Rebalance of the likelihood of many dilemmas triggering
16) Doctors strike situation less directly tied to state health care now, more related to wages.
17) Rail Strike situation less directly tied to state rail now, more related to wages.
18) Luddite riots now less immediately triggered, and also suppressed by Tear Gas, Rubber Bullets and Water Cannons.
19) Tasers no longer useful against Race Riots, but Tear Gas, Rubber Bullets and Water Cannons now work against them.
20) Fixed wrong requirements in guides for top marx achievement.
21) Changes to UK starting conditions to include many policies that should be already in place.
22) Changes to USA starting conditions to include many policies that should be already in place.
23) CO2 Emissions have a stronger affect now on Average Temperature
24) Road Building now has a more skewed and stronger negative effect on traffic congestion.
25) Cyclones now easier to trigger.
26) Fixed achievement bug that meant some achievements were unusually hard.
27) A whole bunch of previously super-hard achievements are now a bit easier.
28) Events have been re-balanced.