Move welcome text to correct subdirectory

Merge pull request ppy#103 from MiraiSubject/fallback-intro

Merge pull request ppy#102 from MiraiSubject/fallback-audio

Add nekodex' welcome to osu! audio track

Merge pull request ppy#101 from smoogipoo/update-cursortrail-shader

Add TexRect to CursorTrail shader

Merge pull request ppy#100 from peppy/add-taiko-slider

Add taiko "slider" resources

Merge pull request ppy#99 from Craftplacer/taiko-don

Add taiko mascot resources

Merge pull request ppy#97 from peppy/add-taiko-hitcircle-resources

Add missing taiko samples and hitcircle resources

Merge pull request ppy#96 from peppy/add-taiko-drum

Add taiko legacy skin resources

Merge pull request ppy#95 from smoogipoo/add-mania-resources

Add mania lighting textures

Merge pull request ppy#94 from smoogipoo/add-mania-resources

Add skinnable mania resources