| Fixed Issue 74; removed the need to track PSwingCanvas.SwingWrapper instances in the PSwingRepaintManager, making the memory leak a non-issue | 
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| extras/src/main/java/edu/umd/cs/piccolox/pswing/PSwingCanvas.java | 
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| extras/src/main/java/edu/umd/cs/piccolox/pswing/PSwingRepaintManager.java | 
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