20200822

• Fix some memory leaks caused by the single song window
• Read Pro Drums format from .chart files
• Fix a bug where lanes could be redrawn incorrectly when importing from PS/CH format
• Be more lenient when reading some spec-incorrect MIDI files
• Significantly faster REAPER project generation
• Draw lanes and BREs in 3D preview
• DTX import: better audio sample mixing, and a smarter algorithm for assigning cymbal colors
• Pass tuning cents to REAPER project VSTs