Made the expectation of running WordPress in multisite mode explicit in the readme.
Made the expectation of running WordPress in multisite mode explicit in the readme.

cilcoberlin/wp-class-blogs,cilcoberlin/wp-class-blogs,oberlin/wp-class-blogs,oberlin/wp-class-blogs,oberlin/wp-class-blogs,cilcoberlin/wp-class-blogs,cilcoberlin/wp-class-blogs,oberlin/wp-class-blogs