Kushite tweaks and balancing
Add an anti-champ/hero bonus to Meriotic Temple Guards.
Make the Temple of Amun a unique building available in the City phase.
Adjust some auras and add one for cheaper triremes.
Nerf clubman attack, remove spearmen tweaks.
Change barracks cost.
Fix some icons.
Differential Revision: https://code.wildfiregames.com/D1343
Patch by: Hannibal_Barca
Comments by: Nescio, Grugnas, elexis, Sundiata, mimo