add gitignore file

Change-Id: Iec743cde1242bc28b21225e52251d8553a551723

.gitignore

diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..2069abc
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1,5 @@
+.idea
+*iml
+/lib
+/out
+.DS_Store
\ No newline at end of file