This patch corrects the style of the {civ}.json files, per https://trac.wildfiregames.com/wiki/Coding_Conventions#JSON
* insert space between { and "
* insert space between : and "
* insert space between " and }
* remove space between . and "
* remove space between : and "
* replace `"."`, `"emblem.png"`, `"History."`, `"SB1"`, `"SB2"`, `"Unknown."`, etc. with simply `""`
* correct indentation
See also D2000.