Resolve issue with city phase not being accessible by norse civ, opti…

…on 2

* Problems:
  - The city phase icon will be beside the town phase icon in the UI, rather than appearing upon research of the town phase. This will affect all
civs.

simulation/data/technologies/phase_city_generic.json

@@ -0,0 +1,17 @@
+{
+	"genericName": "City Phase",
+	"specificName": {
+		"mace": "Megalopolis",
+		"spart": "Megalopolis",
+		"athen": "Megalopolis"
+	},
+	"description": "Advances from a bustling town to a veritable metropolis, full of the wonders of modern technology.",
+	"cost": {"food": 0, "wood": 0, "stone": 1000, "metal": 1000},
+	"requirements": { "class": "Town", "number": 4 },
+	"requirementsTooltip": "Requires 4 new Town Phase structures (except Walls and Civic Centers).",
+	"icon": "city_phase.png",
+	"supersedes": "phase_town",
+	"researchTime": 80,
+	"tooltip": "Advance to City Phase, which unlocks more structures and units. Territory radius for Civic Centers increased by another +50%",
+	"soundComplete": "interface/alarm/alarm_phase.xml"
+}