Add IntelliJ files to gitignore

Change-Id: I7600680cf559314356fc9478e7100918f334b9dd
diff --git a/.gitignore b/.gitignore
index 81322bc..8967117 100644
--- a/.gitignore
+++ b/.gitignore
@@ -5,3 +5,7 @@
 /bazel-*
 /eclipse-out
 /node_modules
+
+# IntelliJ files
+.idea
+*.iml
\ No newline at end of file