Fix typo
Merge branch 'master' of https://github.com/ngthanhtrung23/VOJRankBot
Merge pull request #2 from khuebeo/master

installation instructions
Refactor code
Remove duplicates when a user used multiple languages
Stop crawling when seeing score 0 for OI problems
Merge branch 'flashmt'
Uncomment code
Update rank
Refactor code. Add sort icons
Add back button
Add data.js. Fix relative path
Fix wrong data.js path
Bug fix: wrong AC in acm problems. Extra comma in username
Improvement: Pause crawling after some problems