Blight mechanics, Blight spell, various GP promotion fixes

This commit also removes dll from project
Update .gitignore
Update .gitignore
Delete CvGameCore_Ea.dll
Update README with correct Media Pack link
Revert "Compiled DLL update"

This reverts commit f88c4adaf01d99dec7f3dc99776edbeaf9ac30b7.
Merge branch 'master' of https://github.com/Pazyryk/Ea_III_Sword_and_Sorcery