add "wijax" to the list of acceptable wp query vars. this allows go-sphinx to handle wp_queries from widgets that pass in their widget ids (which are ignored and not used by go-sphinx)

related to https://github.com/GigaOM/legacy-pro/issues/3854
more consistent comment block
Merge pull request #32 from wluo/github-3854

allow go-sphinx to handle wp queries from widgets