Gradle build fixes

Updated the version because the old one had a time bomb to deprecate itself.
Added .idea ignores (because they are generated and shouldn't be checked in)

Change-Id: I45b1a6fbba11268e6c3d7a4b8cb5af40d8ccb0fa
diff --git a/.gitignore b/.gitignore
index 08a55c0..eee06e7 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1 +1,2 @@
 .gradle
+.idea/