Implement osu!mania performance calculator
Fix converted beatmap hitwindows not working correctly
Fix taiko slider multiplier being applied twice
Implement taiko performance calculation
Multiplayer base screen
Fix incorrect namespace of OsuPerformanceCalculator
Speed up beatmap parsing and conversion
Fix hold notes never dying
Screen breadcrumbs
Use a stable sort for hitobjects
Fix conversion tests for ruleset-specific beatmaps not working
Make OsuPerformanceCalculator use the new hitresult namings
TRuleset was a mistake. This resulted in cases that checked whether the beatmap was for the current ruleset (TaikoBeatmapConverter and ManiaBeatmapConverter) failing due to TestXRuleset != XRuleset...