Add school profiles support. Currently, the only significant thing school profiles does is provide a different blog of HTML at the bottom of the input.php page so that users may receive school-specific instructions on how to use slate_permutate. School profiles _will_ be extended to provide autocompletion of sections for a specific course based on previously crawling a college's registration website. All-in-all, it maintains a simple school_id string which can be used by other components to uniquely identify a school for any arbitrary purpose.