Add .idea in the .gitignore

git-svn-id: https://svn.apache.org/repos/asf/servicemix/smx4/specs/trunk@1407738 13f79535-47bb-0310-9956-ffa450edef68
diff --git a/.gitignore b/.gitignore
index e45abe8..fe30fe5 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,2 +1,3 @@
 target
-*.i??
\ No newline at end of file
+*.i??
+.idea