Change some types from "custom" to "game" (#36)

* Add GDRB DLC icon

* Add missing comma

* Change type from custom to game for FoF, GP, GF, and CH

extra/index.json

@@ -319,7 +319,7 @@
 				"en-US": "Clone Hero"
 			},
 			"icon": "clonehero",
-			"type": "custom"
+			"type": "game"
 		},
 		{ 
 			"ids": [ "codered" ],
@@ -511,7 +511,7 @@
 				"en-US": "Frets on Fire"
 			},
 			"icon": "fof",
-			"type": "custom"
+			"type": "game"
 		},
 		{ 
 			"ids": [ "fuse" ],
@@ -535,15 +535,15 @@
 				"en-US": "GuitarFreaks"
 			},
 			"icon": "generic",
-			"type": "custom"
+			"type": "game"
 		},
 		{ 
 			"ids": [ "gf2dm1" ],
 			"names": {
 				"en-US": "GuitarFreaks 2ndMIX & DrumMania"
 			},
 			"icon": "generic",
-			"type": "custom"
+			"type": "game"
 		},
 		{ 
 			"ids": [ "addygh" ],
@@ -583,23 +583,23 @@
 				"en-US": "Guitar Praise"
 			},
 			"icon": "praise",
-			"type": "custom"
+			"type": "game"
 		},
 		{ 
 			"ids": [ "praisedlc" ],
 			"names": {
 				"en-US": "Guitar Praise: Expansion Pack 1"
 			},
 			"icon": "generic",
-			"type": "custom"
+			"type": "game"
 		},
 		{ 
 			"ids": [ "stryper" ],
 			"names": {
 				"en-US": "Guitar Praise: Stryper"
 			},
 			"icon": "stryper",
-			"type": "custom"
+			"type": "game"
 		},
 		{ 
 			"ids": [ "guitarzero2" ],