Update README.md

/////////////////////version 3.3//////////////////////////////////////////////

last update 2013.10.23

新增团购类API
-(NSArray*)fetchGroupBuyingUsingKeyword:(NSString*)KeyWord withPageIndex:(NSInteger)pageIndex withCityName:(NSString*)cityString withDistName:(NSString*)DistString withAreaKey:(NSString*)Areakey;

-(NSArray*)fetchGroupBuyingUsingGPSlatlon:(NSString*)latString withlonString:(NSString*)lonString withCoordType:(NSInteger)type withRadius:(NSInteger)radius withPageIndex:(NSInteger)pageIndex;

新增淘宝店铺退关类API
更多细节可以查看本文档后面的细节

-(NSArray*)fetchTBshopItemsWithKeyword:(NSString*)keyString WithPageIndex:(NSInteger)pageIndex WithSortingMethodString:(NSString*)sortingString;