move train-script to scenario service
show item-description, in chioce item
add line to item-define
move method of rest_time-script
implment slave_detail
move script, about buy slave in short-money
change link to slave-detail
implement slave.description
more awesome views for slave-description
some method move to method_def/item
rename to method_def/slave_buy
consider item[:description] is nil