2020.530.0

Tagged release: 2020.530.0

Beatmap conversion changes:

• Added generation of dual notesheets
• Convert short duration (etna) sliders to single hits since short notesheets aren't fun
• Restrict number of alternate minions for short sliders with many repeats (they were unplayable)

Gameplay changes:

• Fix bad hit windows
• Fix notesheet tail not being correctly checked
• Allow player to switch between primary/secondary keys and not break a notesheet

Other changes:

• Added more default playback mods

Brain Power is a fairly close recreation of the Muse Dash version (sans-sawblades).