Use proper gem on each platform
Ran `rails generate performance_test scoreboard`
Make it possible to test scoreboard page performance
Test with populated database
Make users attend the contest
Update README
Merge branch 'master' into performance

Conflicts:
	Gemfile.lock
Enhance performance test.
Use constant strings instead of symbols. Enhance performance test.
Enhance populate and performance test. #219
Merge pull request #228 from AI-comp/performance

Add performance test