position is now always set (#1076)

commafeed-server/src/main/java/com/commafeed/frontend/model/Category.java

@@ -35,5 +35,5 @@ public class Category implements Serializable {
 	private boolean expanded;
 
 	@ApiModelProperty(value = "position of the category in the list", required = true)
-	private Integer position;
+	private int position;
 }

commafeed-server/src/main/java/com/commafeed/frontend/model/Subscription.java

@@ -54,7 +54,7 @@ public class Subscription implements Serializable {
 	private String categoryId;
 
 	@ApiModelProperty("position of the subscription's in the list")
-	private Integer position;
+	private int position;
 
 	@ApiModelProperty(value = "date of the newest item", dataType = "number")
 	private Date newestItemTime;