remove unnecessary function
add css image
add css images for spider lecture
fix bug in html
start to rename announcement to notification
rename announcement to notification, start to debug
lecture can be used now, but ugly, start to add template for activity
finish add_activity
finish add_lecture
start to use global.js
stop trying using global.js , start to refactor lecture and spider
fix bug of spider, start to found why 'speaker' of notification is set to tuple
still can't find why the result of 'speaker' is tuple, but amend the implementation
add template of lecture
Merge branch 'mydev' of github.com:doyoubi/stucampus into mydev
finish manage of lecture, error message excluded
add FormsetPaginator
finish manage of activity, pagination excluded
let manage of lecture use formset paginator
start to add pagination bar in html