Add support for City of Heroes (Homecoming) (#114)

cache_domains.json

@@ -15,6 +15,11 @@
 			"description": "CDN for blizzard/battle.net",
 			"domain_files": ["blizzard.txt"]
 		},
+		{
+			"name": "cityofheroes",
+			"description": "CDN for City of Heroes (Homecoming)",
+			"domain_files": ["cityofheroes.txt"]
+		},
 		{
 			"name": "daybreak",
 			"description": "Daybreak games CDN",

cityofheroes.txt

@@ -0,0 +1 @@
+cdn.homecomingservers.com