.gitignore in opal-rails-0.4.0 vs .gitignore in opal-rails-0.5.0.pre

@@ -1,7 +1,8 @@
 /.bundle/
 /log/*.log
 /pkg/
+/tmp
 /test_app/db/*.sqlite3
 /test_app/log/*.log
 /test_app/tmp/
 /test_app/.sass-cache
 Gemfile.lock