prepare for case of converter not being set.
return array if converter is not set.
forgot return... test Dao without Converter object.
list of columns using array_keys if $data is an array.
test using UsersConverter and UserEntity;
ignore converting to object if $value is already an object.
test on converting to Enum objects.
write up some code example on converter and related stuff.
Merge branch 'works' of github.com:asaokamei/WScore.DbGateway into works