fixed bugs
fixed magazine bug
fixed activity date bug.caused by using datetime instead of date
fix message box bug in manage system
Merge branch 'fastdev' of git.oschina.net:doyoubi/stucampus into fastdev
amend notification spider
hide deleted articles
modify some hyperlink
now magazine can be deleted
let empty url_id acceptable in lecture
comment some unused link in template
fixed display problem in table of lecture and activity
add download link in magazine. add log
fix time bug of the table in lecture and activity
fix requirements.txt
Merge pull request !531 from shonenada/fix-requirements.txt
add szuspeech. permission check not added yet
add permission check in szuspeech
Merge branch 'fastdev' of git.oschina.net:doyoubi/stucampus into fastdev
add raven