fix psgan doc (#92)

docs/en_US/tutorials/psgan.md

@@ -19,7 +19,7 @@ python tools/psgan_infer.py \
   --config-file configs/makeup.yaml \
   --model_path /your/model/path \
   --source_path  docs/imgs/ps_source.png  \
-  --reference_dir docs/imgs/ref/ps_ref \
+  --reference_dir docs/imgs/ref \
   --evaluate-only True
 ```
 **params:**

docs/zh_CN/tutorials/psgan.md

@@ -19,7 +19,7 @@ python tools/psgan_infer.py \
   --config-file configs/makeup.yaml \
   --model_path /your/model/path \
   --source_path  docs/imgs/ps_source.png  \
-  --reference_dir docs/imgs/ref/ps_ref \
+  --reference_dir docs/imgs/ref \
   --evaluate-only True
 ```
 **参数说明:**

ppgan/apps/psgan_predictor.py

@@ -210,8 +210,10 @@ class PSGANPredictor(BasePredictor):
 
             ref_img_name = os.path.split(reference_path)[1]
             if not os.path.exists(self.output_path):
-                os.makedirs(sefl.output_path)
+                os.makedirs(self.output_path)
 
             save_path = os.path.join(self.output_path,
                                      'transfered_ref_' + ref_img_name)
             image.save(save_path)
+            print('Transfered image {} has been saved!'.format(save_path))
+        print('done!!!')