add board model
add topic model
set pow and g board controller
board's crud
add topics controller
add message to xdite at topic controller
switch to practice2
add validate to board
finnish topic controller and view, add flash, short some code
install devise, generate devise view, add name to user
add name form at devise view, topic login_required
only logined user can create topic and board. adjust ui at topic show to hide edit and destroy. board's ui will fix at next practice
board strong params user_id