Ignoring MacOS .DS_Store

Change-Id: I2e7249a745b242743ed8e7b581ae1dc851da3914

.gitignore

diff --git a/.gitignore b/.gitignore
index 337f707..f2e8830 100644
--- a/.gitignore
+++ b/.gitignore
@@ -4,3 +4,4 @@
 .settings
 .idea
 *.iml
+.DS_Store