Change not to ignore valid files (PyTorchKorea#151)

Author: 9bow

.gitignore

@@ -1,10 +1,10 @@
 # sphinx things
-beginner
-intermediate
-advanced
-pytorch_basics
+/beginner
+/intermediate
+/advanced
+/pytorch_basics
 /recipes
-prototype
+/prototype
 
 #data things
 _data/
@@ -17,6 +17,7 @@ beginner_source/faces/
 beginner_source/hybrid_frontend/data/
 beginner_source/hymenoptera_data/
 intermediate_source/data/
+prototype_source/data/
 *.zip
 MNIST/
 
@@ -123,3 +124,4 @@ cleanup.sh
 
 # PyTorch things
 *.pt
+*.pth