Release_3.0

All synth and effects updated

What's Changed

• Add comprehensive disclaimer to README and unit documentation by @fedemone in #65
• Increase master gain and add output clamping to prevent clipping by @fedemone in #66
• Increase Crystal filter output makeup gain for esotico preset by @fedemone in #67
• Add LevelRef calibrated reference signal and output stage for drumlogue by @fedemone in #68
• Pass 46: gong preset stacking and subsonic filtering by @fedemone in #70
• Add polyphonic output stage and measurement tools to EffeESP32 by @fedemone in #69
• Pass 47: Fix master limiter gain staging with per-preset trim by @fedemone in #71

Full Changelog: 2.5...3.0