start south migration for bookmarks app
add new bookmarks model -> Link
add new bookmarks model -> Bookmark
modify bookmarks->view.py to use templates
add new bookmarks->user_page
add sample bookmarks
add login page to bookmarks
add new logout view to bookmarks
improve template by using template inheritance
improve overall website presentation
improve login/logout functionality
add registration form to bookmarks
add register_success page for bookmarks
add new bookmarks model->Tag
make bookmarks model more readable
add new view for user to save bookmarks
replace custom-made login with django built-in login
after login, user will be now be redirected to previous url
add new template to show a list of bookmarks
improve user_pages