Add override_node_options module as submodule (7.x-1.12 tag)

The point of this is to give an OG site the ability to dole out options like "Publish/Unpublish", "Sitcky to top of lists", etc without giving a user the full administer content permission that these things are governed under by default.

I think this fits our "preferred module requirement" that the use of this is not a deal breaker for future upgradability - if this module had to be left behind, the site would still function .