Update README

Author: kevin-lyn

README.md

@@ -55,6 +55,7 @@ STHTTPNetTaskQueueHandler *httpHandler = [[STHTTPNetTaskQueueHandler alloc] init
 
 @property (nonatomic, strong) NSString *title;
 @property (nonatomic, strong) NSString *body;
+@property (nonatomic, strong) NSDate *date;
 @property (nonatomic, assign) int userId;
 @property (nonatomic, strong, readonly) NSDictionary *post;