Unfortunately, instrospection.get_table_description runs
select * from course_overview_courseoverview, which of course
does not exist while django is calculating initial migrations, causing
this to fail. Additionally, sqlite does not support information_schema,
but does not do a select * from the table.
Lift the main part of mysql's get_table_description up to the migration itself
and just inspect it directly. Continue to call the API for sqlite.
