Add `Scaral::Util` to dependencies
Update tests for `Raisin::API` && `Raisin::Entity`
Update build meta file
Include missed entity into MusicApp
Add `Rose::DB::Object` objects
replace `undef` to `return`
Add `Rose::DB::Object` example; Rename `music_app.psgi` to `music_app_dbix`
Update POD