Update gitignore file for BAD project

Add several file filters for project files generated by intelliJ

Change-Id: I2feb1594e78c6c893da3b888f4c678d2c00934c7
diff --git a/.gitignore b/.gitignore
index 42fc47d..00a7ae5 100644
--- a/.gitignore
+++ b/.gitignore
@@ -7,3 +7,5 @@
 .DS_Store
 *.swp
 build
+*.iml
+.idea/*