Fix tests with VS2015 and VS2017
diff --git a/.gitignore b/.gitignore
index 8f89b80..4cea432 100644
--- a/.gitignore
+++ b/.gitignore
@@ -9,4 +9,16 @@
 bazel-out
 bazel-testlogs
 # python
-*.pyc
\ No newline at end of file
+*.pyc
+
+# Visual Studio files
+*.sdf
+*.opensdf
+*.VC.opendb
+*.suo
+*.user
+_ReSharper.Caches/
+Win32-Debug/
+Win32-Release/
+x64-Debug/
+x64-Release/