-Persian population cap bonus (+10%)
-"Immortals" technology for Persians. Reduces training time for Anusiya
by half. This is their "special" for now, since they are otherwise
unchanged from the default Champion Spearman.
-"Persian Architecture" technology for Persians (removes the inherent
health bonus and makes it a "special tech" instead).
-Added the Spartan City Phase civ bonus. Spartan citizen-soldiers now
promote directly from Basic to Elite after one kill. Pop cap is reduced
by -10% at the City Phase to balance.
-Updated civ JSON files (and their civ profiles on Trac).
-Adds map preview image for Acropolis 7.
This was SVN commit r12748.