PowerChord

Fixes:

• Re-allow playing fifths without cooldown - sneaking plays chords in reverse.
• Fix buff duration numbers - most buffs should be roughly 10s now.
• Modified a few chord progressions to select for better buffs - major spirits now have 1+546 progressions so that aug chords aren't unused.

Changelog: https://github.com/hestimae/powerchord/releases/tag/v0.3.1