Added support for Visual Studio 2017 in gitignore
diff --git a/.gitignore b/.gitignore
index db8a893..f22ba00 100644
--- a/.gitignore
+++ b/.gitignore
@@ -186,3 +186,6 @@
 # Common build subdirectories.
 ./.build/
 ./_build/
+
+# Visual Studio 2017
+.vs