[UPDATE] Modify description length in Entity
[UPDATE] Merge userData and onlineUserData
[UPDATE] Minimized style files and script files
[UPDATE] Slowdown the frequence of ranklist refresh
[UPDATE] Beautify contest page
[UPDATE] Cache the rank list
Merge pull request #159 from mzry1992/connections-reduce

Connections reduce
[UPDATE] Refactor user and permission logical in frontend
[UPDATE] Review front-end scripts
[FIX] Every search method should return a pageInfo entity
[UPDATE] Review whole front end
Merge pull request #160 from mzry1992/front-end-review

Front end review
[FIX] Status in contest stashed after contest is ended
[UPDATE] Remove suppress warnings
[UPDATE] Validate contest in each branch respectively
Merge pull request #164 from mzry1992/fix-issue-162

Status in contest stashed after contest is ended