design in README

Signed-off-by: Zeljko <zeljko@zwr.fi>
add fields to user table

Signed-off-by: Zeljko <zeljko@zwr.fi>
generate scaffold race

Signed-off-by: Zeljko <zeljko@zwr.fi>
relation category-race

Relation established in both models and all relevant views updated.
In addition, migration is performed.

Signed-off-by: Zeljko <zeljko@zwr.fi>
remove second dog from design

Signed-off-by: Zeljko <zeljko@zwr.fi>