Add rating chart
Add basic rating chart
Optimis chart background
Add codeforces rank list parser
Add hack information
Merge pull request #249 from mzry1992/training-system

Add rating chart and codeforces rank list parser
Fix contest page range issue
Merge pull request #251 from mzry1992/contest-page-range-issue

Fix contest page range issue
Fix gradle build script
Merge pull request #253 from mzry1992/training-system

Fix gradle build script
Add deduct rating feature
Add topcoder rank list parser
Modify x-label of training rating chart
Merge pull request #254 from mzry1992/training-system

Add deduct rating feature
Add select user feature in rating chart
Add tooltip in rating chart
Merge pull request #255 from mzry1992/training-system

Add select user feature in rating chart