edit test described in user_pages_spec.rb -section 9.1.1
user edit action added in user controller : listing 9.2
edit.html.erb added, for editing users
settings test added to authentication tests
sign in methods defined in application helper; settings links added in header listing 9.5 and 9.6
update action defined in user controller listing 9.8
describe test for update action in user page specs listing 9.9
correct_user before filter to protect the edit/update pages in user controller
adding store location to signed in user in user controller
completing user edit,update,index and destroy actions