Added Stealth tech and Stealth Bombers (#4271)

* Changed some interception-related uniques

- "Can not be intercepted" -> "Cannot be intercepted"
  This really irked me, and the new version is also how it is written
  in the wiki.
- "Reduces damage taken from interception by 50%" ->
  "Damage taken from interception reduced by [50]%"

* Added "Cannot be carried by [unitFilter] units" unique

* Added an icon for Stealth

* Added Stealth technology and the Stealth Bomber

* Possibly fixed incorrect rounding for interception damage bonus

* Various code style changes

* Made Stealth Bomber interceptable, but with 100% damage reduction

android/assets/jsons/Civ V - Vanilla/Techs.json

@@ -621,8 +621,14 @@
 			{
 				"name": "Nanotechnology",
 				"row": 7,
-				"prerequisites": ["Robotics","Lasers"],
+				"prerequisites": ["Robotics"],
 				"quote": "'The impact of nanotechnology is expected to exceed the impact that the electronics revolution has had on our lives.' - Richard Schwartz"
+			},
+			{
+				"name": "Stealth",
+				"row": 8,
+				"prerequisites": ["Robotics", "Lasers"],
+				"quote": "'Be extremely subtle, even to the point of formlessness, be extremely mysterious, even to the point of soundlessness. Thereby you can be the director of the opponent' state.' – Sun Tzu"
 			}
 		]
 	},
@@ -636,7 +642,7 @@
 			{
 				"name": "Future Tech",
 				"row": 5,
-				"prerequisites": ["Particle Physics", "Nuclear Fusion", "Nanotechnology"],
+				"prerequisites": ["Particle Physics", "Nuclear Fusion", "Nanotechnology", "Stealth"],
 				"uniques": ["Who knows what the future holds?", "Can be continually researched"],
 				"quote": "'I think we agree, the past is over.' - George W. Bush"
 			}

android/assets/jsons/Civ V - Vanilla/UnitPromotions.json

@@ -287,7 +287,7 @@
 	{
 		"name": "Evasion",
 		"prerequisites": ["Siege II", "Bombardment II"],
-		"effect": "Reduces damage taken from interception by 50%",
+		"effect": "Damage taken from interception reduced by [50]%",
 		"unitTypes": ["Bomber"]
 	},
 	

android/assets/jsons/Civ V - Vanilla/Units.json

@@ -1134,7 +1134,7 @@
 		"cost": 375,
 		"requiredTech": "Radar",
 		"requiredResource": "Oil",
-		//"upgradesTo": "Stealth Bomber",
+		"upgradesTo": "Stealth Bomber",
 		"attackSound": "shot"
 	},
 	{
@@ -1150,7 +1150,7 @@
 		"requiredTech": "Radar",
 		"requiredResource": "Oil",
 		"promotions": ["Evasion", "Siege I"],
-		//"upgradesTo": "Stealth Bomber",
+		"upgradesTo": "Stealth Bomber",
 		"attackSound": "shot"
 	},
 	{
@@ -1350,22 +1350,19 @@
 		"requiredResource": "Uranium",
 		"uniques": ["Can move after attacking", "No defensive terrain bonus"]
 	},
-	/*
 	{
 		"name": "Stealth Bomber",
 		"unitType": "Bomber",
 		"movement": 2,
 		"strength": 85,
-		"rangedStrength": 65,
+		"rangedStrength": 85,
 		"range": 20,
 		"cost": 425,
 		"requiredTech": "Stealth",
 		"requiredResource": "Aluminum",
-		"uniques": ["Evasion", "6 tiles in every direction always visible"],
+		"uniques": ["Damage taken from interception reduced by [100]%", "Cannot be carried by [Carrier] units", "6 tiles in every direction always visible"],
 		"attackSound": "shot"
-		// cannot be based on carrier
 	},
-	*/
 
 	/* Great people */