Insights Fixes (#526)

Summary:
Insights example no longer worked after building master. This seems to be because of 2 issues:

1. Paths in setup.py needed to be updated after this refactoring #419 .
2. cifar_torchvision.pt seems to have been corrupted when this file was moved in #419, based on comparing the sizes in these 2 revisions:
https://github.com/pytorch/captum/blob/9bcf257f9b3811230f370ced1b0801d8df5aa9ee/captum/insights/models/cifar_torchvision.pt - > 244 KB
https://github.com/pytorch/captum/blob/master/captum/insights/attr_vis/models/cifar_torchvision.pt - >239 KB (master)

It seems like this was caused by the new file not being detected as binary, causing some corruption when pushed. This updates gitattributes to treat all .pt files as binary.

Pull Request resolved: #526

Reviewed By: bilalsal

Differential Revision: D24952285

Pulled By: vivekmig

fbshipit-source-id: 77b54caad7a4f2d2888ea59260603e00d62748ec

.gitattributes

@@ -1 +1,2 @@
 tutorials/* linguist-documentation
+*.pt binary

setup.py

@@ -54,9 +54,9 @@ def report(*args):
 INSIGHTS_REQUIRES = ["flask", "ipython", "ipywidgets", "jupyter"]
 
 INSIGHTS_FILE_SUBDIRS = [
-    "insights/frontend/build",
-    "insights/models",
-    "insights/widget/static",
+    "insights/attr_vis/frontend/build",
+    "insights/attr_vis/models",
+    "insights/attr_vis/widget/static",
 ]
 
 TUTORIALS_REQUIRES = INSIGHTS_REQUIRES + ["torchtext", "torchvision"]