Remove dead variables.

Signed-off-by: Max Fierke <max@maxfierke.com>
Add MySQL migration for removing AUTO_INCREMENT from os_settings.id

Signed-off-by: Max Fierke <max@maxfierke.com>
Clean up some more mess.

Signed-off-by: Max Fierke <max@maxfierke.com>
Enable HTTP method override via _method request parameter.

Signed-off-by: Max Fierke <max@maxfierke.com>