Darkened new diplo BG.

New diplo background + loading screen by Adumi-san.

Remembered to change a few event subscriptions from LocalPlayerTurn to GameTurn.

Consolidated the alternative portraits mod into this one.

Increased Skeleton's CostProgressionParam1 to better scale with contemporary units.

Added concat in prop function that sets properties for UI tracking.

Updated lua table to account for buildings that get relic slots through modifiers. Removed H&L mode from reduced GSP list, since heroic relics don't generate GSP. Changed a few property types for multiple Valkrana support.

CN TL thanks to PhantomJ_M

Forgot to comment out a print that'd end up spamming the log. OTL

Switched to Game.GetRandNum() for better PBC support.
Added Mechanized Infantry as Skeleton upgrade since its strength caps at 70.