ignore idea files

git-svn-id: https://svn.apache.org/repos/asf/directmemory/lightning/trunk@1398351 13f79535-47bb-0310-9956-ffa450edef68
diff --git a/.gitignore b/.gitignore
index 16bf5c5..795e102 100644
--- a/.gitignore
+++ b/.gitignore
@@ -3,4 +3,6 @@
 .settings/
 .project
 .classpath
-*.class
\ No newline at end of file
+*.class
+.idea/
+*.iml