add missing "required" flags

src/main/java/com/commafeed/frontend/model/UnreadCount.java

@@ -4,6 +4,7 @@ import java.io.Serializable;
 import java.util.Date;
 
 import io.swagger.annotations.ApiModel;
+import io.swagger.annotations.ApiModelProperty;
 import lombok.Data;
 
 @SuppressWarnings("serial")
@@ -11,8 +12,13 @@ import lombok.Data;
 @Data
 public class UnreadCount implements Serializable {
 
+	@ApiModelProperty
 	private long feedId;
+
+	@ApiModelProperty
 	private long unreadCount;
+
+	@ApiModelProperty
 	private Date newestItemTime;
 
 	public UnreadCount() {