This fixes some issues with the map http://osu.ppy.sh/s/484689 . There is still one problem with an almost stationary slider in this map at around the 2/3 mark, but the rest seems to work fine now.
Load player async
Custom sliders
Per @Tom94's suggestion, the bars track the nub in Update instead of animating seperately. Also only animates when the event source is the keyboard.
Add Preview Time on selection of beatmap
Add very basic hitsound support.
# Conflicts: # osu.Game.Modes.Osu/Objects/Drawables/DrawableSlider.cs
Update framework.