Adjust onsite rank list
Frozen board in the last one hours
Add frozenTime field in contest database
Show current time in contest status bar
Refresh rank list when enter rank list page
Add code print feature in contest
Add print message button
Add contest problem solved graph under contest rank list
Update version
Fix article display issue
Enable c++11
Update fastjson and sun.mail
Expand problem data upload file size limit
Add read more to avoid long article content in list
Add DOMJudge result exporter
Merge pull request #228 from mzry1992/6thsccpc

Refactor for Onsite contest
Remove old training system entities
Remove directories before generate codes
Remove out-date code
Merge pull request #231 from mzry1992/training-system

Remove old training system