gitignore updates.

Most yml files are ignored in gitlab/config/, except resque.yml
=> add it to the list of ignored files.

.gitignore

@@ -19,6 +19,7 @@ config/gitlab.yml
 config/database.yml
 config/initializers/omniauth.rb
 config/unicorn.rb
+config/resque.yml
 db/data.yml
 .idea
 .DS_Store