Add icon for rankings overlay header (ppy#84)

Add icon for rankings overlay header

Remove transparent pixels from icons

Merge pull request ppy#81 from LeNitrous/nightcore-samples

Add nightcore-related samples

Merge pull request ppy#79 from peppy/add-virtual-track-beatmap

Add a beatmap resource which is backed by a virtual track

Merge pull request ppy#59 from EVAST9919/search-header

Add background for Search overlay

Fix taiko sample name casing (ppy#76)

Fix taiko sample name casing

Merge pull request ppy#75 from peppy/fix-ruleset-case

Fix ruleset folder case

Merge pull request ppy#74 from peppy/play-to-gameplay

Move textures to Gameplay folder

Merge pull request ppy#73 from peppy/add-legacy-skin

Add legacy skin resources

Add spinner samples for each bank (ppy#71)

Add spinner samples for each bank