Replace deprecated rake/rdoctask with rdoc/task.
Replace deprecated rake/rdoctask with rdoc/task.

silvermind/bookyt_salary,silvermind/bookyt_salary,huerlisi/bookyt_stock,huerlisi/bookyt_salary,huerlisi/bookyt_pos,huerlisi/bookyt_salary,huerlisi/bookyt_stock,silvermind/bookyt_salary,huerlisi/bookyt_pos,huerlisi/bookyt_pos,huerlisi/bookyt_salary