customer the controller of devise.
remove the view to the customer directory.
custom the devise layout
(1)remove the simple_time_select plugin from vendor directory.(because this
		style will not support from rails 4.0)
(2)modified the test file to rake test success.
add the comment example for rdoc
(1)ignore swp temp file.
(2)add example`s return value(red color) of post rdoc.
add a task unit case.
add a integration case of user login flow.