Fix misc. small attribute requirements.

Author: eldering

contest-api/json-schema/group.json

@@ -8,7 +8,7 @@
 		"id": { "$ref": "common.json#/identifier" },
 		"icpc_id": { "type": [ "string", "null" ] },
 		"name": { "type": "string" },
-		"type": { "type": "string" }
+		"type": { "type": [ "string", "null" ] }
 	},
 	"required": ["id", "name"],
 	"$ref": "common.json#/strictproperties"

contest-api/json-schema/team-member.json

@@ -19,6 +19,6 @@
 		"role": { "enum": [ "contestant", "coach" ] },
 		"photo": { "$ref": "common.json#/imagerefsornull" }
 	},
-	"required": ["id", "team_id", "first_name", "last_name"],
+	"required": ["id", "team_id", "first_name", "last_name", "role"],
 	"$ref": "common.json#/strictproperties"
 }

contest-api/json-schema/team.json

@@ -17,7 +17,11 @@
 			"properties": {
 				"x": { "type": "number" },
 				"y": { "type": "number" },
-				"rotation": { "type": "number" }
+				"rotation": {
+					"type": "number",
+					"minimum": 0,
+					"maximum": 360
+				}
 			},
 			"required": ["x", "y", "rotation"],
 			"$ref": "common.json#/strictproperties"