Remove _instance from Plugin class

Signed-off-by: boozaa <boozaa@shortrip.org>
More comments

Signed-off-by: boozaa <boozaa@shortrip.org>
Move config files on same package with ConfigFile inheritence

Signed-off-by: boozaa <boozaa@shortrip.org>
Cleanup

Signed-off-by: boozaa <boozaa@shortrip.org>