Pixel Remaster BGM Swap

Various BGM tracks in the game swapped out for either their Pixel Remaster rearrangements or just to replace another BGM where it seemed fitting. They are set to just loop very simply and have been tested, but if there's any issues, just let me know.

There's just a handful but I'll continue updating (probably).

Tracklist (so far):
- The Altar Cave (Labyrinth of the Ancients)
- The Crystal Tower (Syrcus Tower)
- The Dark Crystals (World of Darkness)
- Town Theme (FFV, replaces Phantom Village theme)
- Doga & Unei (FFIII, replaces Lakeland Day Theme)