General taiko fixes
Rename Accented to Strong.
Drawable DrumRoll Implementation (Input only)
Update grade textures.
Add UpdateableAvatar to handle the toolbar use-case.
Fix regression in mouse dragging behaviour.
Drawable Bash Implementation (Input only)
Move validKeys to DrawableTaikoHitObject. Cleanup + reword comments.
Conflicts: osu.Game.Modes.Taiko/Objects/Drawable/DrawableTaikoHitObject.cs osu.Game.Modes.Taiko/osu.Game.Modes.Taiko.csproj