* Add link rel canonical to all pages (/ points itself instead of /?page=current-season because Google crawls duplicate versions of pages less often. I want / to be crawled frequently, so it has to be the canonical version of the content it holds)
* Fix a bug where passing an invald page slug would mean that no page was highlighted as current in the footer
Media control addition was a hot fix which skipped my normal development enviroment, where I was working on the app rename. This merges the two branches.
SQL to migrate the DB. Create migrations, migrate
`DELETE FROM django_content_type WHERE app_label='thoughts';`
`UPDATE django_content_type SET app_label='thoughts' WHERE app_label='main';`
`DROP TABLE thoughts_thought;`
`ALTER TABLE main_thought RENAME TO thoughts_thought;`
`DELETE FROM django_migrations WHERE app='main';`
Hopefully that's right, I'm not going to double check it or anything.
Matthias Portzel