Fix User model for superuser_creator script, cuz Sentry User model is overriden and it leads to errors in chef provision
replace node --> node.set, otherwise it breaks provision for Chef 11
Merge pull request #12 from prawn-cake/fix_node_attribute_setter_in_nginx_recipe

replace node --> node.set, otherwise it breaks provision for Chef 11
Updated superuser_creator script template, added compatibility with django < 1.5
Merge pull request #11 from prawn-cake/fix_superuser_creator_User_model

Fix User model for superuser_creator script