[Feature] piano2 and piano3.ogg original versions

[JerryIsBored]

Hey there,

A few updates ago, the modern music was replaced by C418's music (a great choice, by the way!). However, I remember back in beta there were different versions of piano2.ogg (Wet Hands) and piano3.ogg (Mice on Venus). These versions can be found here: https://www.youtube.com/watch?v=FNjoz09vmP8
https://www.youtube.com/watch?v=oZ2EVZH6wI8

While Wet Hands isn't much different (it's just missing the upper harmonies at the end), Mice on Venus is considerably shorter, only having the piano solo section. It would be nice to see these added to the pack, not as replacements for the current versions of these songs, but alongside them.