Add IntelliJ IDEA files in the .gitignore

git-svn-id: https://svn.apache.org/repos/asf/karaf/webconsole/trunk@1226704 13f79535-47bb-0310-9956-ffa450edef68
diff --git a/.gitignore b/.gitignore
index 40a1c0d..39857c9 100644
--- a/.gitignore
+++ b/.gitignore
@@ -4,3 +4,5 @@
 *target
 .DS_Store
 bin
+*.i??
+.idea