add Stanford_Cars datasets & model

README.md

@@ -81,7 +81,7 @@ The data is available for free to researchers for non-commercial use.
 * Stanford_Cars官网地址：http://ai.stanford.edu/~jkrause/cars/car_dataset.html
 
  ![stanford_cars](https://codechina.csdn.net/EricLee/classification/-/raw/master/samples/xyxy_21-45-281-133_02577.jpg)
- 
+* 该数据集出自以下论文：
 ```
  3D Object Representations for Fine-Grained Categorization
  Jonathan Krause, Michael Stark, Jia Deng, Li Fei-Fei